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Published byChloe Carson Modified over 9 years ago
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The Hand and Wrist- Structure and Function
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The Hand - It’s Role u Prehension - Opposition of the thumb u Effector organ of the upper limb u Very sensitive and accurate sensory receptor u Communicates with the brain about thickness and distance u Stereognosis
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Prehension u Gripping ability u Tarsier can grip with tail and hand
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Braciation u Upper limb used as a means of locomotion
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The Radiocarpal joint u 1. Articulation between the lower end of the radius and the proximal row of carpal bones u 2.Intercarpal joints
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The carpal bones u Bones in the shape of a gutter u Concave anteriorly u Flexor retinaculum forms a tunnel - carpal tunnel
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The muscles of the wrist Anterior aspect u flexor carpi radialis u palmaris longus u flexor carpi ulnaris u flexor digitorum profundus u flexor digitorum superficialis u flexor pollicis longus
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The muscles of the wrist Posterior aspect u extensor carpi ulnaris u extensor carpi radialis brevis u extensor carpi radialis longus
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Regions of the hand - functionally divided u The thumb - opposition u The index and middle finger u The ring and little fingers
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Muscles of the Hypothenar Eminence
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Muscle of the Hypothenar eminence u Flexor digiti minimi u Adductor digiti minimi u Opponens digiti minimi
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Muscles of the thenar eminence Extrinsic muscles u Abductor pollicis longus u Extensor pollicis brevis u Extensor pollicis longus Intrinsic muscles u Flexor pollicis brevis u Opponens pollicis u Abductor pollicis u Abductor pollicis brevis u Anterior interosseus u Adductor pollicis
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The intrinsic muscles of the hand u Lumbricals (2nd-5th finger) attachments on the tendons of flexor digitorum profundus insert onto extensor apponeurosis u Interossei dorsal abduct (dab) palmar adduct (pad)
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