AnatomyZone

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AnatomyZone is the leading resource for simple and concise 3D anatomy tutorials, with over 200 videos and a new range of interactive 3D anatomy models.

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Last post: Nov 12, 2022
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Site title: AnatomyZone - Your Guide to Human Anatomy
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Cricothyroid Ligament
Nov 12, 2022 · original
The cricothyroid ligament (also known as the cricothyroid membrane or cricovocal membrane) connects the thyroid cartilage with the cricoid cartilage below. It is composed of two parts: median cricothyroid ligament lateral cricothyroid ligament The median cricothyroid ligament is the thickened part of the ligament in the midline. On either side of this are the lateral cricothyroid ligaments , known also as the conus elasticus, which is the thinner part of the structure which extends superiorly from the upper border of the cricoid cartilage to end in a free margin within the triangular space created by the thyroid lamina above. These free margins are thickened to form the vocal ligaments which lie under the vocal folds to form the true ‘vocal cords’ . The two upper free margins attach anteriorly to the inner surface of the thyroid cartilage in the midline, and posteriorly to the vocal proc
Posterior Talofibular Ligament (PTFL)
Nov 9, 2022 · original
The posterior talofibular ligament ( PTFL ) is one of the three ligaments which make up the lateral collateral ligament complex of the ankle . The components of this ligamentous complex are: anterior talofibular ligament posterior talofibular ligament calcaneofibular ligament . The posterior talofibular ligament takes a horizontal course across the malleolar fossa, attaching on one side to the medial aspect of the lateral malleolus, and on the other side, to the lateral tubercle on the posterior surface of the talus. The posterior talofibular ligament is the least commonly injured ligament of the three lateral ligament complex ligaments of the ankle. The post Posterior Talofibular Ligament (PTFL) appeared first on AnatomyZone .
Angiogenesis
Jun 3, 2016 · original
Angiogenesis Illustration of the progression of angiogenesis. Angiogenesis is the physiological process of new blood vessel growth from PRE-EXISTING vessels. This is a different process from that of NEW blood vessel growth, which is called vasculogenesis. Angiogenesis is a fascinating process that is involved in both normal physiology (wound healing and formation of granulation tissue) and also in the pathological process of tumour transformation. Tumours require a rich blood supply in order to grow and continue rapidly dividing. To enable further growth angiogenesis is critical, and is therefore a key step in the transformation of a benign tumour into a malignant one. For this reason, inhibition of angiogenesis is a key target of anti-tumour cancer therapies. Image credit: Dr Jon Heras The post Angiogenesis appeared first on AnatomyZone .
Pisiform Bone
Jul 19, 2015 · original
Pisiform Bone The structure indicated is the pisiform bone of the hand. There are three groups of bones in the hand: Carpal bones (8 in total) Metacarpal bones Phalanges The carpal bones are separated into two rows : Proximal row Distal row The pisiform bone is one of four bones in the proximal row of carpals ( scaphoid, lunate, triquetral, pisiform ). The pisiform bone is a tiny sesamoid bone located in the tendon of the flexor carpi ulnaris muscle. It articulates with the palmar surface of the triquetral bone. Learn more about the anatomy of the bones of the hand in this tutorial. The post Pisiform Bone appeared first on AnatomyZone .
Dorsal Interossei
Jul 18, 2015 · original
Dorsal Interossei The structure indicated is the first dorsal interosseous muscle of the hand. The dorsal interossei belong to the intrinsic group of muscles which act on the hand. The intrinsic muscles include the following muscles/groups: Thenar group (act on thumb) Hypothenar group (act on little finger) Adductor pollicis Lumbricals Interossesus muscles (dorsal and palmar) Palmaris brevis All the intrinsic muscles of the hand, except the thenar muscles and the lateral two lumbrical muscles are innervated by the deep branch of the ulnar nerve . The thenar muscles and the lateral two lumbrical muscles are innervated by the median nerve . A useful mnemonic for remembering this is MEATLOAF. “ M EAT” refers to the M edian nerve, and LOAF refers to the muscles which it innervates: L ateral two lumbricals, O pponens pollicis, A bductor pollicis brevis, F lexor pollicis brevis. The interosseo
First Metatarsal
Jul 17, 2015 · original
First Metatarsal The structure indicated is the first metatarsal bone of the foot. The foot contains three groups of bones: Tarsals Metatarsals Phalanges There are 7 tarsal bones, and 5 metatarsals . The metatarsals are numbered from 1 to 5 from medial to lateral, with the first metatarsal belonging to that of the great toe (hallux) and the 5 th metatarsal belonging to that of the little toe. The metatarsals consist of the following parts: Base Shaft Head Learn more about the anatomy of the bones of the foot in this anatomy tutorial. The post First Metatarsal appeared first on AnatomyZone .
Talus
Jul 16, 2015 · original
Talus The structure indicated is the talus bone of the foot. The foot contains three groups of bones: Tarsals Metatarsals Phalanges The talus is one of seven tarsal bones. There are three groups of tarsal bones: Proximal group Intermediate group Distal group There are two bones in the proximal group of tarsal bones: the talus and the calcaneus . The calcaneus is the largest tarsal bone and forms the heel through its posterior projection. The talus articulates with the medial malleolus of the tibia and the lateral malleolus of the fibula to form the ankle joint. In addition, it articulates with two other tarsal bones: the calcaneus inferiorly, and the navicular anteriorly. The talus consists of the following main components: Head : contains facets for articulation with navicular and calcaneus Neck Body : elevated trochlear surface articulates with inferior end of tibia Learn more about th
First Metacarpal
Jul 14, 2015 · original
First Metacarpal The structure indicated is the first metacarpal of the hand. There are three groups of bones in the hand: Carpal bones (8 in total) Metacarpal bones Phalanges The carpal bones are separated into two rows : Proximal row Distal row There are 5 metacarpal bones numbered 1 to 5 and are located between the carpal bones and the phalanges. The first metacarpal bone is associated with the thumb , the 5 th metacarpal bone is associated with the little finger . The joints between the carpals and the metacarpals are known as carpometacarpal joints . The joints between the metacarpals and the proximal phalanges are known a metacarpophalangeal (MCP) joints. In addition, the bases of the metacarpal bones articulate with each other. The first carpometacarpal joint of the thumb is particularly important; the articulation between the first metacarpal and the trapezium bone forms a saddle
Cuboid Bone
Jul 13, 2015 · original
Cuboid Bone The structure indicated is the cuboid bone of the foot. The foot contains three groups of bones: Tarsals Metatarsals Phalanges The cuboid bone is one of seven tarsal bones. There are three groups of tarsal bones: Proximal group Intermediate group Distal group The cuboid bone belongs to the distal group of tarsal bones. There are four bones in the distal group: Lateral cuneiform Intermediate cuneiform Medial cuneiform Cuboid The cuboid bone is the most lateral bone in the distal row of tarsal bones, it is named on the basis of its shape which roughly resembles a cube. The plantar surface of the cuboid bone contains a groove through which the tendon of the peroneus longus travels from the lateral aspect of the foot to insert medially at the base of the first metatarsal and on the medial cuneiform bone. The tibialis posterior muscle inserts onto the plantar surface of the cuboid
First Lumbrical
Jul 11, 2015 · original
First Lumbrical The structure indicated is the first lumbrical muscle of the hand. The lumbricals belong to the intrinsic group of muscles which act on the hand. The intrinsic muscles include the following muscles/groups: Thenar group (act on thumb) Hypothenar group (act on little finger) Adductor pollicis Lumbricals Interossesus muscles Palmaris brevis All the intrinsic muscles of the hand, except the thenar muscles and the lateral two lumbrical muscles are innervated by the deep branch of the ulnar nerve . The thenar muscles and the lateral two lumbrical muscles are innervated by the median nerve . A useful mnemonic for remembering this is MEATLOAF. “ M EAT” refers to the M edian nerve, and LOAF refers to the muscles which it innervates: L ateral two lumbricals, O pponens pollicis, A bductor pollicis brevis, F lexor pollicis brevis. There are 4 lumbrical muscles which originate from th

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