Attaches to the base of the proximal phalanx of the thumb. The deep head is innervated by the deep branch of the ulnar nerve.
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By TeachMeSeries Ltd Hypothenar Muscles The hypothenar muscles produce the hypothenar eminence — a muscular protrusion on the medial side of the palm, at the base of the little finger. Opponens Digiti Minimi The opponens digit minimi lies deep to the other hypothenar muscles. Attachments : Originates from the hook of hamate and associated flexor retinaculum, inserts into the medial margin of metacarpal V.
Actions : It rotates the metacarpal of the little finger towards the palm, producing opposition. Abductor Digiti Minimi The most superficial of the hypothenar muscles. Attachments : Originates from the pisiform and the tendon of the flexor carpi ulnaris. It attaches to the base of the proximal phalanx of the little finger.
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Actions : Abducts the little finger. Flexor Digiti Minimi Brevis This muscles lies laterally to the abductor digiti minimi.
Attachments : Originates from the hook of hamate and adjacent flexor retinaculum, and inserts into the base of the proximal phalanx of the little finger. Actions : Flexes the MCP joint of the little finger. Lumbricals These are four lumbricals in the hand, each associated with a finger. Attachments : Each lumbrical originates from a tendon of the flexor digitorum profundus.
They pass dorsally and laterally around each finger, and inserts into the extensor hood. Innervation : The lateral two lumbricals of the index and middle fingers are innervated by the median nerve. The medial two lumbricals of the little and ring fingers are innervated by the ulnar nerve. Interossei The interossei muscles are located between the metacarpals.wmemsf.mediebruket.no/boutique-azithromycine-100mg-nom-de-la-marque.php
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Dorsal Interossei The most superficial of all dorsal muscles, these can be palpated on the dorsum of the hand. Attachments : Each interossei originates from the lateral and medial surfaces of the metacarpals. They attach into the extensor hood and proximal phalanx of each finger. Actions : Abduct the fingers at the MCP joint. Innervation : Ulnar nerve.
Palmar Interossei These are located anteriorly on the hand. Actions : Adducts the fingers at the MCP joint. Attachments : Originates from the palmar aponeurosis and flexor retinaculum, attaches to the dermis of the skin on the medial margin of the hand. Actions : Wrinkles the skin of the hypothenar eminence and deepens the curvature of the hand, improving grip. Adductor Pollicis This is large triangular muscle with two heads. Attachments : One head originates from metacarpal III. Both attach into the base of the proximal phalanx of the thumb.
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Actions : Adductor of the thumb. Found an error? Is our article missing some key information? When there is something wrong with them, you may not be able to do your regular activities. Hand Injuries and Disorders.
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Hand problems include Carpal tunnel syndrome - compression of a nerve as it goes through the wrist, often making your fingers feel numb Injuries that result in fractures broken bones , ruptured ligaments and dislocations Osteoarthritis - wear-and-tear arthritis, which can also cause deformity Tendinitis - irritation of the tendons Disorders and injuries of your fingers and thumb.
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