"Talus bone The talus (; Latin for ankle), talus bone, astragalus , or ankle bone is one of the group of foot bones known as the tarsus. The tarsus forms the lower part of the ankle joint through its articulations with the lateral and medial malleoli of the two bones of the lower leg, the tibia and fibula. Within the tarsus, it articulates with the calcaneus below and navicular in front within the talocalcaneonavicular joint. Through these articulations, it transmits the entire weight of the body to the foot. The second largest of the tarsal bones, it is also one"
"Thalamus The thalamus (from Greek , ""chamber"") is a large mass of gray matter in the dorsal part of the diencephalon of the brain with several functions such as relaying of sensory signals, including motor signals to the cerebral cortex, and the regulation of consciousness, sleep, and alertness. It is a midline symmetrical structure of two halves, within the vertebrate brain, situated between the cerebral cortex and the midbrain. It is the main product of the embryonic diencephalon, as first assigned by Wilhelm His Sr. in 1893. The thalamus is a paired structure of gray matter located in the forebrain"
"in coma. Thalamus The thalamus (from Greek , ""chamber"") is a large mass of gray matter in the dorsal part of the diencephalon of the brain with several functions such as relaying of sensory signals, including motor signals to the cerebral cortex, and the regulation of consciousness, sleep, and alertness. It is a midline symmetrical structure of two halves, within the vertebrate brain, situated between the cerebral cortex and the midbrain. It is the main product of the embryonic diencephalon, as first assigned by Wilhelm His Sr. in 1893. The thalamus is a paired structure of gray matter located in"
"Tarsus (skeleton) The tarsus is a cluster of seven articulating bones in each foot situated between the lower end of tibia and fibula of the lower leg and the metatarsus. It is made up of the midfoot (cuboid, medial, intermediate, and lateral cuneiform, and navicular) and hindfoot (talus and calcaneus). The tarsus articulates with the bones of the metatarsus, which in turn articulate with the proximal phalanges of the toes. The joint between the tibia and fibula above and the tarsus below is referred to as the ankle joint. In humans the largest bone in the tarsus is the calcaneus,"
"Calcaneus In humans, the calcaneus (; from the Latin ""calcaneus"" or ""calcaneum"", meaning heel) or heel bone is a bone of the tarsus of the foot which constitutes the heel. In some other animals, it is the point of the hock. In humans, the calcaneus is the largest of the tarsal bones and the largest bone of the foot. The talus bone, calcaneus, and navicular bone are considered the proximal row of tarsal bones. In the calcaneus, several important structures can be distinguished: The half of the bone closest to the heel is the calcaneal tuberosity. On its lower edge"
"(""pes valgus""), and if it is turned laterally the foot is in an inverted position (""pes varus""). The talar shelf is typically involved in subtalar or talocalcaneal tarsal coalition. Calcaneus In humans, the calcaneus (; from the Latin ""calcaneus"" or ""calcaneum"", meaning heel) or heel bone is a bone of the tarsus of the foot which constitutes the heel. In some other animals, it is the point of the hock. In humans, the calcaneus is the largest of the tarsal bones and the largest bone of the foot. The talus bone, calcaneus, and navicular bone are considered the proximal row"
"of the bones in the human body with the highest percentage of its surface area covered by articular cartilage. Additionally, it is also unusual in that it has a retrograde blood supply, i.e. arterial blood enters the bone at the distal end. In humans, no muscles attach to the talus, unlike most bones, and its position therefore depends on the position of the neighbouring bones. Though irregular in shape, the talus can be subdivided into three parts. Facing anteriorly, the head carries the articulate surface of the navicular bone, and the neck, the roughened area between the body and the"
"on either side are its lateral and medial processes (serving as the origins of the abductor hallucis and abductor digiti minimi). The Achilles tendon is inserted into a roughened area on its superior side, the cuboid bone articulates with its anterior side, and on its superior side are three articular surfaces for the articulation with the talus bone. Between these superior articulations and the equivalents on the talus is the tarsal sinus (a canal occupied by the interosseous talocalcaneal ligament). At the upper and forepart of the medial surface of the calcaneus, below the middle talar facet, there is a"
"symbolic meaning. The talus apparently derives from the fusion of three separate bones in the feet of primitive amphibians; the ""tibiale"", articulating with tibia, the ""intermedium"", between the bases of the tibia and fibula, and the ""fourth centrale"", lying in the mid-part of the tarsus. These bones are still partially separate in modern amphibians, which therefore do not have a true talus. The talus forms a considerably more flexible joint in mammals than it does in reptiles. This reaches its greatest extent in artiodactyls, where the distal surface of the bone has a smooth keel to allow greater freedom of"
"body. The ""Malleolus"" () is the bony prominence on each side of the ankle. These are known as the medial and lateral malleolus. Each leg is supported by two bones, the tibia on the inner side (medial) of the leg and the fibula on the outer side (lateral) of the leg. The ""medial malleolus"" is the prominence on the inner side of the ankle, formed by the lower end of the tibia. The ""lateral malleolus"" is the prominence on the outer side of the ankle, formed by the lower end of the fibula. The ""trochanters"" are parts of the femur,"
"Malleus The malleus or hammer is a hammer-shaped small bone or ossicle of the middle ear which connects with the incus and is attached to the inner surface of the eardrum. The word is Latin for ""hammer"" or ""mallet"". It transmits the sound vibrations from the eardrum to the ""incus"". The malleus is a bone situated in the middle ear. It is the first of the three ossicles, and attached to the tympanic membrane. The ""head of the malleus"" is the large protruding section, which attaches to the incus. The head connects to the ""neck of malleus"", and the bone"
"Sagittal keel The sagittal keel (torus) is a thickening of bone on part or all of the midline of the frontal bone, or parietal bones where they meet along the sagittal suture, or on both bones. Sagittal keels differ from sagittal crests, which are found in some earlier hominins (notably the genus ""Paranthropus"") and in a range of other mammals. While a proper crest functions in anchoring the muscles of mastication to the cranium, the keel is lower and rounded in cross-section, and the jaw muscles do not attach to it. Sagittal keels occur in several early human species, most"
"prominent on the dactylus (seventh and terminal segment of their thoracic appendages) at mid-length, and a similar slightly smaller tooth on the pollex. The pollex is broad basally, evenly tapering. The dactylus is broadest at mid-length and equal to the manus in length. The manus is moderately broad and its breadth is equal to its length. The dorsum is slightly convex longitudinally, strongly convex laterally, with teeth in the middle continuing onto the distal half. The carpus (third segment from the distal end of the leg) bears a large broad hook-shaped mesial spine (missing on left cheliped). The angle of"
"is an indentation distal to the head of the humerus on which the articular capsule attaches. The greater tubercle (""tuberculum majus""; greater tuberosity) is situated lateral to the head and lesser tubercle, and just lateral to the anatomical neck. Its upper surface is rounded and marked by three flat impressions: the highest of these gives insertion to the supraspinatus muscle; the middle to the infraspinatus muscle; the lowest one, and the body of the bone for about 2.5 cm. below it, to the teres minor muscle. The lateral surface of the greater tubercle is convex, rough, and continuous with the"
"thick, convex, free border. Splenium translates as ""bandage"" in Greek. The trunk of the corpus callosum lies between the splenium and the genu. The callosal sulcus separates the corpus callosum from the cingulate gyrus. On either side of the corpus callosum, the fibers radiate in the white matter and pass to the various parts of the cerebral cortex; those curving forward from the genu into the frontal lobes constitute the ""forceps minor"" (also ""forceps anterior"") and those curving backward from the splenium into the occipital lobes, the ""forceps major"" (also ""forceps posterior""). Between these two parts is the main body"
"Thorax The thorax or chest (from the Greek θώραξ ""thorax"" ""breastplate, cuirass, corslet"" via ) is a part of the anatomy of humans and various other animals located between the neck and the abdomen. The thorax includes the thoracic cavity and the thoracic wall. It contains organs including the heart, lungs, and thymus gland, as well as muscles and various other internal structures. Many diseases may affect the chest, and one of the most common symptoms is chest pain. In humans and other hominids, the thorax is the chest region of the body between the neck and the abdomen, along"
"Consisting of two layers and appearing slightly pinkish in hue, it is associated with Eustachian tube dysfunction and cholesteatomas. The larger pars tensa consists of three layers: skin, fibrous tissue, and mucosa. Its thick periphery forms a fibrocartilaginous ring called the anulus tympanicus, while the central umbo tents inward at the level of the tip of malleus. The middle fibrous layer, containing radial, circular, and parabolic fibers, encloses the handle of malleus. Though comparatively robust, the pars tensa is the region more commonly associated with perforations. The manubrium () of the malleus is firmly attached to the medial surface of"
"tempus meaning “time.” The muscle covers the temporal bone, or time bone, which received its name because the hair of the head covering this bone is often the first hair to turn gray during the aging process. Therefore, this region is the first to show the effects of aging. Temple (anatomy) The temple indicates the side of the head behind the eye between the forehead and the ear. The bone beneath is the temporal bone as well as part of the sphenoid bone. Cladists classify land vertebrates based on the presence of an upper hole, a lower hole, both, or"
"Glans The glans (, plural ""glandes"" ; from the Latin word for ""acorn"") is a vascular structure located at the tip of the penis in male mammals or a homologous genital structure of the clitoris in female mammals. The exterior structure of the glans consists of mucous membrane, which is usually covered by foreskin or clitoral hood in naturally developed genitalia. This covering, called the prepuce, is normally retractable in adulthood. The glans naturally joins with the inner labia, and the frenulum of the penis or clitoris. In non-technical or sexual discussions, often the word ""clitoris"" refers to the external"
"Tail The tail is the section at the rear end of an animal's body; in general, the term refers to a distinct, flexible appendage to the torso. It is the part of the body that corresponds roughly to the sacrum and coccyx in mammals, reptiles, and birds. While tails are primarily a feature of vertebrates, some invertebrates including scorpions and springtails, as well as snails and slugs, have tail-like appendages that are sometimes referred to as tails. Tailed objects are sometimes referred to as ""caudate"" and the part of the body associated with or proximal to the tail are given"
"Temple (anatomy) The temple indicates the side of the head behind the eye between the forehead and the ear. The bone beneath is the temporal bone as well as part of the sphenoid bone. Cladists classify land vertebrates based on the presence of an upper hole, a lower hole, both, or neither in the cover of dermal bone that formerly covered the temporalis muscle, whose origin is the temple and whose insertion is the jaw. The brain has a lobe called the temporal lobe. The word ""templar"" as used in anatomy has a separate etymology from the word ""temple"", meaning"
"Tarsal tunnel syndrome Tarsal tunnel syndrome (TTS), also known as posterior tibial neuralgia, is a compression neuropathy and painful foot condition in which the tibial nerve is compressed as it travels through the tarsal tunnel. This tunnel is found along the inner leg behind the medial malleolus (bump on the inside of the ankle). The posterior tibial artery, tibial nerve, and tendons of the tibialis posterior, flexor digitorum longus, and flexor hallucis longus muscles travel in a bundle through the tarsal tunnel. Inside the tunnel, the nerve splits into three different segments. One nerve (calcaneal) continues to the heel, the"
"sulcus - from the inferior side of the foramina of Monro to the anterior side of the cerebral aqueduct. The lateral border posterior/superior of the sulcus constitutes the thalamus, while anterior/inferior of the sulcus it constitutes the hypothalamus. The interthalamic adhesion usually tunnels through the thalamic portion of the ventricle, joining together the left and right halves of the thalamus, although it is sometimes absent, or split into more than one tunnel through the ventricle; it is currently unknown whether any nerve fibres pass between the left and right thalamus via the adhesion (it has more resemblance to a herniation"
"called the mamma or mammary, the armpit as the axilla and axillary, and the navel as the umbilicus and umbilical. The pelvis is the lower torso, between the abdomen and the thighs. The groin, where the thigh joins the trunk, are the inguen and inguinal area. The entire arm is referred to as the brachium and brachial, the front of the elbow as the antecubitis and antecubital, the back of the elbow as the olecranon or olecranal, the forearm as the antebrachium and antebrachial, the wrist as the carpus and carpal area, the hand as the manus and manual, the"
"Subtalar joint In human anatomy, the subtalar joint, also known as the talocalcaneal joint, is a joint of the foot. It occurs at the meeting point of the talus and the calcaneus. The talus is oriented slightly obliquely on the anterior surface of the calcaneus. There are two points of articulation between the two bones: one anteriorly and one posteriorly: There are three articulating facets between the talus and the calcaneus, delineated as the anterior, middle and posterior facets. The sustentaculum tali forms the floor of middle facet, and the anterior facet articulates with the head of the talus, and"
"fluid is produced and circulated. Below the corpus callosum is the septum pellucidum, a membrane that separates the lateral ventricles. Beneath the lateral ventricles is the thalamus and to the front and below this is the hypothalamus. The hypothalamus leads on to the pituitary gland. At the back of the thalamus is the brainstem. The basal ganglia, also called basal nuclei, are a set of structures deep within the hemispheres involved in behaviour and movement regulation. The largest component is the striatum, others are the globus pallidus, the substantia nigra and the subthalamic nucleus. Part of the dorsal striatum, the"
"Callus (mollusc) A callus is an anatomical feature that exists in some mollusk shells, a thickened area of shell material that can partly or completely cover the umbilicus, or can be located as a coating on the body whorl near the aperture of the shell (i.e. a parietal callus or columellar callus). A callus exists in the shells of various species of gastropods (snails) and also in the shells of several species of ""Nautilus"", a cephalopod. A callum is an anatomical feature of some mature bivalve shells of species in the family Pholadidae, the piddocks. The callum is an area"
"The leg (between the knee and the ankle) is the crus and crural area, the lateral aspect of the leg is the peroneal area, and the calf is the sura and sural region. The ankle is the tarsus and tarsal, and the heel is the calcaneus or calcaneal. The foot is the pes and pedal region, and the sole of the foot the planta and plantar. As with the fingers, the toes are also called the digits, phalanges, and phalangeal area. The big toe is referred to as the hallux. Following are lists of surface anatomical features in humans and"
"tail, even when such an appendage is located where the tail would be expected. Humans have a ""tail bone"" (the coccyx) attached to the pelvis, formed of fused vertebrae, usually four, at the bottom of the vertebral column. It does not protrude externally. Tail The tail is the section at the rear end of an animal's body; in general, the term refers to a distinct, flexible appendage to the torso. It is the part of the body that corresponds roughly to the sacrum and coccyx in mammals, reptiles, and birds. While tails are primarily a feature of vertebrates, some invertebrates"
"the hemispheres. The main ones are known as the genu, the rostrum, the trunk or body, and the splenium. The corpus callosum forms the floor of the longitudinal fissure that separates the two cerebral hemispheres. It also forms part of the roof of the lateral ventricles. The corpus callosum has four main parts; individual nerve tracts that connect different parts of the hemispheres. These are the rostrum, the genu, the trunk or body, and the splenium. A narrowed part between the trunk and the splenium is known as the isthmus. The front part of the corpus callosum, towards the frontal"
"Oral torus An oral torus is a lesion made of compact bone and occurs along the palate or the mandible inside the mouth. The palatal torus or ""torus palatinus"" occurs along the palate, close to the midline, whereas the mandibular torus or ""torus mandibularis"" occur along the lingual side of the mandible. Occurrences of tori are more frequent in women than in men. Tori are associated with adulthood and rarely appear before the age of 15. The palatal version of tori have a higher occurrence in Native American and Inuit populations. Treatment is not necessary unless they become an obstruction"
"Calf (leg) The calf (Latin: sura) is the back portion of the lower leg in human anatomy. The muscles within the calf correspond to the posterior compartment of the leg. The two largest muscles within this compartment are known together as the calf muscle and attach to the heel via the Achilles tendon. Several other, smaller muscles attach to the knee, the ankle, and via long tendons to the toes. The calf is composed of the muscles of the posterior compartment of the leg: The gastrocnemius and soleus (composing the triceps surae muscle) and the tibialis posterior. The sural nerve"
"is a tagma composed of three sections, the prothorax, mesothorax and the metathorax. The anterior segment, closest to the head, is the prothorax, with the major features being the first pair of legs and the pronotum. The middle segment is the mesothorax, with the major features being the second pair of legs and the anterior wings. The third and most posterior segment, abutting the abdomen, is the metathorax, which features the third pair of legs and the posterior wings. Each segment is dilineated by an intersegmental suture. Each segment has four basic regions. The dorsal surface is called the tergum"