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Joints of the hand, X-ray Interphalangeal ligaments and phalanges. Right hand. Deep dissection. Posterior (dorsal) view. The PIP joint exhibits great lateral stability. Its transverse diameter is greater than its antero-posterior diameter and its thick collateral ligaments are tight in all positions during flexion, contrary to those in the metacarpophalangeal joint.
In the foot, the distal phalanges are flat on their dorsal surface. It is largest proximally and tapers to the distal end. The proximal part of the phalanx presents a broad base for articulation with the middle phalanx, and an expanded distal extremity for the support of the nail and end of the toe. [10]: 6b. 3.
A single median band passes down the middle of the finger along the back of the proximal phalanx, inserting into the base of the middle phalanx. A band known as the retinacular ligament runs obliquely along the middle phalanx, and connects the fibrous digital sheath on the anterior side of the phalanges to the extensor expansion.
This is a list of human anatomy mnemonics, categorized and alphabetized.For mnemonics in other medical specialties, see this list of medical mnemonics.Mnemonics serve as a systematic method for remembrance of functionally or systemically related items within regions of larger fields of study, such as those found in the study of specific areas of human anatomy, such as the bones in the hand ...
medial side of base of proximal phalanx of first digit medial plantar nerve: abducts hallux: adductor hallucis: 2 1 flexor digitorum brevis: Lower limb, plantar, first layer, left/right medial process of calcaneus, plantar aponeurosis, intermuscular septa: middle phalanges of digits 2–5 medial plantar nerve: flexes lateral four toes
Medial side of the base of the proximal phalanx of the thumb and the ulnar sesamoid: Ulnar nerve (C8-T1) Adducts at the CMC joint and opposition First dorsal interosseous: Medial side of first metacarpal bone: Lateral side of second proximal phalanx: Ulnar nerve (C8-T1) Flexor pollicis brevis: Trapezium, flexor retinaculum
The medial and lateral surfaces are concave, for the attachment of the interosseus muscles, and separated from one another by a prominent anterior ridge. The dorsal surface presents in its distal two-thirds a smooth, triangular, flattened area which is covered in by the tendons of the extensor muscles. This surface is bounded by two lines ...
Has greater breadth in the distal phalanx than in the proximal phalanx; Is attached to such a mobile metacarpus (which produces most of the opposability) Curls horizontally instead of vertically; and hence the etymology of the word: *tum is Proto-Indo-European for 'swelling' (cf 'tumor' and 'thigh') since the thumb is the stoutest of the fingers.