"also supplies the muscles of the thenar eminence by a recurrent thenar branch. The rest of the intrinsic muscles of the hand are supplied by the ulnar nerve. The median nerve innervates the skin of the palmar (volar) side of the index finger, thumb, middle finger, and half the ring finger, and the nail bed. The radial aspect of the palm is supplied by the palmar cutaneous branch of the median nerve, which leaves the nerve proximal to the wrist creases. This palmar cutaneous branch travels in a separate fascial groove adjacent to the flexor carpi radialis and then superficial"
"Radial nerve The radial nerve is a nerve in the human body that supplies the posterior portion of the upper limb. It innervates the medial and lateral heads of the triceps brachii muscle of the arm, as well as all 12 muscles in the posterior osteofascial compartment of the forearm and the associated joints and overlying skin. It originates from the brachial plexus, carrying fibers from the ventral roots of spinal nerves C5, C6, C7, C8 & T1. The radial nerve and its branches provide motor innervation to the dorsal arm muscles (the triceps brachii and the anconeus) and the"
"the forearm. The radial nerve, which is from the fifth cervical spinal nerve to the first thoracic spinal nerve, originates as the continuation of the posterior cord of the brachial plexus. This nerve enters the lower triangular space (an imaginary space bounded by, amongst others, the shaft of the humerus and the triceps brachii) of the arm and lies deep to the triceps brachii. Here it travels with the deep artery of the arm, which sits in the radial groove of the humerus. This fact is very important clinically as a fracture of the shaft of the bone here can"
"skin between the thumb and index finger. Muscular branches of the radial nerve: Deep branch of the radial nerve: Posterior interosseous nerve (a continuation of the deep branch after the supinator): The radial nerve (and its deep branch) provides motor innervation to the muscles in the posterior compartment of the arm and forearm, which are mostly extensors. Injury to the radial nerve at different levels causes different syndromes with varying motor and sensory deficits. At the axilla At mid-arm Just below the elbow Within the distal forearm: Radial nerve The radial nerve is a nerve in the human body that"
"arm, and later in the anterior compartment of the arm, and continues in the posterior compartment of the forearm. The radial nerve originates from the posterior cord of the brachial plexus with root values of C5 to C8 and T1. From the brachial plexus, it travels behind the third part of the axillary artery (part of the axillary artery distal to the pectoralis minor). In the arm, it runs behind the brachial artery and then enters the lower triangular space to reach the radial sulcus of back of the humerus. It travel downwards together with profunda brachii atery, between the"
"shoulder), triceps (long head) and teres minor (one of the rotator cuff muscles). The axillary nerve also carries sensory information from the shoulder joint, as well as the skin covering the inferior region of the deltoid muscle - the ""regimental badge"" area (which is innervated by the superior lateral cutaneous nerve branch of the axillary nerve). The posterior cord of the brachial plexus splits inferiorly to the glenohumeral joint giving rise to the axillary nerve which wraps around the surgical neck of the humerus, and the radial nerve which wraps around the humerus anteriorly and descends along its lateral border."
"Humeroradial joint The humeroradial joint is the joint between the head of the radius and the capitulum of the humerus, is a limited ball-and-socket joint, hinge type of synovial joint. The annular ligament binds the head of the radius to the radial notch of the ulna, preventing any separation of the two bones laterally. Therefore, the humeroradial joint is not functionally a ball and socket joint, although the joint surface in itself allows movement in all directions The annular ligament secures the head of the radius from dislocation, which would otherwise tend to occur, from the shallowness of the cup-like"
"Radius (bone) The radius or radial bone is one of the two large bones of the forearm, the other being the ulna. It extends from the lateral side of the elbow to the thumb side of the wrist and runs parallel to the ulna. The radius is shorter and smaller than the ulna. It is a long bone, prism-shaped and slightly curved longitudinally. The radius is part of two joints: the elbow and the wrist. At the elbow, it joins with the capitulum of the humerus, and in a separate region, with the ulna at the radial notch. At the"
"the dorsum of inferior side of radius while the 5th compartment is in between radius and ulna. The 6th compartment is in the groove on the dorsum of inferior side of ulna. The hand is innervated by the radial, median, and ulnar nerves. The radial nerve supplies the finger extensors and the thumb abductor, thus the muscles that extends at the wrist and metacarpophalangeal joints (knuckles); and that abducts and extends the thumb. The median nerve supplies the flexors of the wrist and digits, the abductors and opponens of the thumb, the first and second lumbrical. The ulnar nerve supplies"
"at the lateral intermuscular septum of arm, while ""supinator syndrome"" is used for compression at the arcade of Frohse. The ""radial tunnel"" is the region from the humeroradial joint past the proximal origin of the supinator muscle. Some scientists believe the radial tunnel extends as far as the distal border of the supinator. The radial nerve is commonly compressed within a 5 cm region near the elbow, but it can be compressed anywhere along the forearm if the syndrome is caused by injury (e.g. a fracture that puts pressure on the radial nerve). The radial nerve provides sensation to the"
"After it emerges out from the radial sulcus, it supplies the brachialis, brachioradialis and extensor carpi radialis longus. Above the radial sulcus, the radial nerve gives off posterior cutaneous nerve of the arm which supplies the skin at the back of the arm. In the radial sulcus, it gives off lower lateral cutaneous nerve of the arm and posterior cutaneous nerve of the forearm. The radial nerve also gives articular branches to supply the elbow joint. In the forearm, it is divided into a superficial branch (primarily sensory) and a deep branch (primarily motor). It is commonly believed that the"
"is innervated by the radial nerve. Extensor carpi ulnar: originates on the lateral epicondyle of the humerus and inserts on the metacarpal 5 and the accessory carpal bone. It acts to abduct and extend the carpal joint. It is innervated by the radial nerve. Supinator: originates on the lateral epicondyle of the humerus and inserts on the radius. It acts to rotate the forearm laterally. It is innervated by the radial nerve. Abductor pollicis longus: originates on the ulna and inserts on metacarpal 1. It acts to abduct the digit and extend the carpal joints. It is innervated by the"
"Muscular branches of the radial nerve The muscular branches of the radial nerve supply the Triceps brachii, Anconæus, Brachioradialis, and Extensor carpi radialis longus, and are grouped as medial, posterior, and lateral. The medial muscular branches supply the medial head of the Triceps brachii. That to the medial head is a long, slender filament, which lies close to the ulnar nerve as far as the lower third of the arm, and is therefore frequently spoken of as the ""ulnar collateral nerve"". The posterior muscular branch, of large size, arises from the nerve in the groove between the Triceps brachii and"
"of the proximal forearm when asked where it hurts. This may mislead one to suspect a buckle fracture of the proximal radius. There is no tear in the soft tissue (probably due to the pliability of young connective tissues). A ""radial head dislocation"" is mainly caused by trauma, or by a congenital state. The traumatic form is usually seen in infancy and childhood as an isolated injury. Humeroradial joint The humeroradial joint is the joint between the head of the radius and the capitulum of the humerus, is a limited ball-and-socket joint, hinge type of synovial joint. The annular ligament"
"this nerve only provides sensory function to ligaments and articulations of the carpal and metacarpal joints. Since the nerve passes dorsally around the head of the radius, it is susceptible to traction or compression injuries when the elbow joint is injured, in particular, radial dislocation. Another area of potential entrapment is the arcade of Frohse, a fibrous arch formed from the proximal part of the superficial head of the supinator, under which the deep branch of the radial nerve passes. The passage for the nerve varies in size. In some cases of spontaneous paralysis of the nerve, releasing this fibrous"
"radial nerve. ""Caudal and medial muscles of forearm:"" Pronator teres: originates on the medial epicondyle of the humerus and inserts on the medial border of the radius. It acts to rotate forearm medially and flex the elbow. It is innervated by the median nerve. Flexor carpi radial: originates on the medial epicondyle of the humerus and inserts on the palmar side of metacarpals 2 and 3. It acts to flex the carpus. It is innervated by the median nerve. Superficial digital flexor: originates on the medial epicondyle of the humerus and inserts on the palmar surface of the middle phalanges."
"the ulna. The axillary nerve is located at the proximal end, against the shoulder girdle. Dislocation of the humerus's glenohumeral joint has the potential to injure the axillary nerve or the axillary artery. Signs and symptoms of this dislocation include a loss of the normal shoulder contour and a palpable depression under the acromion. The radial nerve follows the humerus closely. At the midshaft of the humerus, the radial nerve travels from the posterior to the anterior aspect of the bone in the ""spiral groove"". A fracture of the humerus in this region can result in radial nerve injury. The"
"aspect of the olecranon. Anconeus is innervated by a branch of the radial nerve (cervical roots 7 and 8) from the posterior cord of the brachial plexus called the nerve to the anconeus. The somatomotor portion of radial nerve innervating anconeus bifurcates from the main branch in the radial groove of the humerus. This innervation pattern follows the rules of innervation of the musculature of the posterior forearm (extensor) compartment by the radial nerve. Its role in elbow extension is trivial in humans. It assists in extension of the elbow, where the triceps brachii is the principal agonist, and supports"
"the adjoining sides of the index and middle fingers; the fourth communicates with a filament from the dorsal branch of the ulnar nerve, and supplies the adjacent sides of the middle and ring fingers. The superficial branch of radial nerve is associated with an entrapment neuropathy called Wartenberg's syndrome. The nerve may be compressed due to wearing a tight wristband, watch or bracelet. Superficial branch of radial nerve The superficial branch of the radial nerve passes along the front of the radial side of the forearm to the commencement of its lower third. It is a sensory nerve. It lies"
"radial nerve also provided motor innervation to the long head of the triceps. However, a study conducted in 2004 found out that axillary nerve innervates the long head of triceps in 20 cadavers without any supply from radial nerve. The following are branches of the radial nerve (including the superficial branch of the radial nerve and the deep branch of the radial nerve/posterior interosseous nerve). Cutaneous innervation by the radial nerve is provided by the following nerve branches: The superficial branch of the radial nerve provides sensory innervation to much of the back of the hand, including the web of"
"retinaculum along with the tendons of flexor digitorum superficialis, flexor digitorum profundus, and flexor pollicis longus. From there, it is divided into recurrent muscular branch and digital cutaneous branch: The naturally occurring anomalies of the median nerve are: The median nerve is the main nerve of the front of the forearm. It supplies the muscles of the front of the forearm and muscles of the thenar eminence, thus controlling the coarse movements of the hand. Therefore, it is also called ""labourer's nerve"". The median nerve has no voluntary motor or cutaneous function in the brachium. It gives vascular branches to"
"branches: Ulnar nerve is also known as ""musician's nerve"" as it controls the fine movements of the fingers. The ulnar nerve also provides sensory innervation to the fifth digit and the medial half of the fourth digit, and the corresponding part of the palm: The ulnar nerve and its branches innervate the following muscles in the forearm and hand: An Articular branch that passes to the elbow joint while the ulnar nerve is passing between the olecranon and medial epicondyle of the humerus. The ulnar nerve can suffer injury anywhere between its proximal origin of the brachial plexus all the"
"head of median nerve), medial cord (ulnar, medial head of median nerve, medial antibrachial cutaneous, medial brachial cutaneous), posterior cord (axillary, radial), controlling the arm. Damage to a person's spinal cord above C-5 may result in respiratory arrest and death if medicinal aid does not intervene. Twelve pairs of cranial nerves emerge from the brain; these affect movements and sensation, and some special organs such as hearing of parts of the head and neck. Movements of the neck includes: flexion, extension, (nodding yes), and rotation (shaking head no). The mouth has evolved to support chewing, (mastication) and swallowing (deglutition), and"
"Deep branch of radial nerve The radial nerve divides into a superficial (sensory) and deep (motor) branch at the cubital fossa. The deep branch of the radial nerve winds to the back of the forearm around the lateral side of the radius between the two planes of fibers of the Supinator, and is prolonged downward between the superficial and deep layers of muscles, to the middle of the forearm. The deep branch provides motor function to the muscles in the posterior compartment of the forearm, which is mostly the extensor muscles of the hand. The radial nerve arises from the"
"the flexor retinaculum, and the extensor retinaculum. As a consequence of these various definitions, fractures to the carpal bones are referred to as carpal fractures, while fractures such as distal radius fracture are often considered fractures to the wrist. The distal radioulnar joint is a pivot joint located between the bones of the forearm, the radius and ulna. Formed by the head of the ulna and the ulnar notch of the radius, this joint is separated from the radiocarpal joint by an articular disk lying between the radius and the styloid process of the ulna. The capsule of the joint"
"Distal radioulnar articulation The distal radioulnar articulation (inferior radioulnar joint) is a joint between the two bones in the forearm; the radius and ulna. It is one of two joints between the radius and ulna, the other being the proximal radioulnar articulation. The distal radioulnar articulation is the one of the two closest to the wrist and hand. The distal radioulnar articulation pivot-joint formed between the head of ulna and the ulnar notch on the lower extremity of radius. The articular surfaces are connected together by the following ligaments: The function of the radioulnar joint is to lift and maneuver"
"band released pressure on the nerve and restored function Considerably diminished in size, it descends as the posterior interosseous nerve. For some authors, the deep branch of the radial nerve is the same as the posterior interosseous nerve. Deep branch of radial nerve The radial nerve divides into a superficial (sensory) and deep (motor) branch at the cubital fossa. The deep branch of the radial nerve winds to the back of the forearm around the lateral side of the radius between the two planes of fibers of the Supinator, and is prolonged downward between the superficial and deep layers of"
"is innervated by the musculocutaneous nerve. Brachialis: originates on the lateral surface of humerus and inserts on the ulnar and radial tuberosities. It acts to flex the elbow. It is innervated by the musculocutaneous nerve. ""Cranial and lateral muscles of antebrachium:"" Extensor carpi radial: originates on the supracondylar crest and inserts on the metacarpals. It acts to extend the carpus. It is innervated by the radial nerve. Common digital extensor: originates on the lateral epicondyle of the humerus and inserts on the distal phalanges. It acts to extend the carpus and joints of the digits 3, 4, and 5. It"
"radial - and it is between these heads that the median nerve and ulnar artery pass. The ulnar collateral ligament of elbow joint gives its origin to part of this muscle. Four long tendons come off this muscle near the wrist and travel through the carpal tunnel formed by the flexor retinaculum. These tendons, along with those of flexor digitorum profundus, are enclosed by a common flexor sheath. The tendons attach to the anterior margins on the bases of the intermediate phalanges of the four fingers. These tendons have a split (Camper's Chiasm) at the end of them through which"
"limit of the cubital fossa, or elbow pit. Despite the bulk of the muscle body being visible from the anterior aspect of the forearm, the brachioradialis is a posterior compartment muscle and consequently is innervated by the radial nerve. Of the muscles that receive innervation from the radial nerve, it is one of only four that receive input directly from the radial nerve. The other three are the triceps, anconeus, and extensor carpi radialis longus. (All other posterior compartment muscles that receive radial innervation are supplied by the deep branch of the radial nerve.) The brachioradialis flexes the forearm at"
"oval head of the radius to rotate freely during pronation and supination. The head of the radius is wider than the bone's neck, and, because the annular ligament embraces both, the radial head is ""trapped"" inside the ligament which thus acts to prevent distal displacement of the radius. Superiorly, the ligament is supported by attachments to the radial collateral ligament and the fibrous capsule of the elbow joint. Inferiorly, a few fibres attached to the neck of the radius support a fold of the synovial membrane without interfering with the movements at the joint. The fibrocartilage on the upper part"
"joints are crossed by the radial wrist muscles (flexor carpi radialis, extensor carpi radialis longus, and extensor carpi radialis brevis). The stability of these two carpometacarpal joints is a functional adaptation that enhances the efficiency of these muscles at the midcarpal and radiocarpal joints. The synovial membrane is a continuation of that of the intercarpal joints. Occasionally, the joint between the hamate and the fourth and fifth metacarpal bones has a separate synovial membrane. The synovial membranes of the wrist and carpus are thus seen to be five in number: Occasionally the fourth and fifth carpometacarpal joints have a separate"
"of the ligament is continuous with the hyaline cartilage of the radial notch. At the posterior attachment the ligament widens to reach above and below the radial notch. A thickened band which extends from the inferior border of the annular ligament below the radial notch to the neck of the radius is known as the quadrate ligament. Children who have not finished fusing their proximal radial epiphyseal plate may suffer dislocations of this joint. This frequently happens when parents sharply jerk their children by their arms, e.g. the act of grabbing a child away from traffic. Annular ligament of radius"