Muscles of the Wrist and HandChapter 7Flexor carpi radialisLocation: PalmarOrigin:which epidcondyle? Insertion: radius sideActions:flexion of the wristabduction of the wristFlexor carpi ulnarisLocation: PalmarOrigin:which epidcondyle?Insertion:ulna sideActions: flexion of the wristadduction of the wristPalmaris longusLocation: PalmarOrigin: Insertion: to neither sideAction: flexion of the wristWhy only flexion?Flexor digitorum superficialisLocation: PalmarOrigin: Insertion: split tendons attach to the sides of the middle phalanx of the four fingersActions: flexion of fingers and wristWhy fingers AND wrist?Flexor digitorum profundusLocation: Palmar Origin: Insertion: split tendons attach to distal phalanx of the four fingers Actions: flexion of fingers AND wristFlexor pollicus longusLocation: PalmarOrigin: Insertion:base of the distal phalanx of the thumb (palmar surface) Actions: flexion of wrist AND thumbabduction of the wristReviewWhat do all the ‘flexor’ muscles have in common?What do the following muscle have in common?Flexor carpi radialisFlexor carpi ulnarisPalmarisFlexor digitorum superficialisExtensor Carpi Radialis LongusLocation: DorsalOrigin: lateral epicondyleInsertion: Actions: Extension of the wrist AbductionExtensor carpi radialis brevisExtension of the wristAbduction of the wristExtensor carpi ulnarisLocation: Dorsal Origin: lateral epicondyle of the humerusInsertion: Actions: extension of the wrist adduction of the wristExtensor digitorumLocation: Dorsal Origin: lateral epicondyle of the humerusInsertion: middle and distal phalanges of the four fingersActions: extension of the fingersextension of the wristExtensor pollicus longusLocation: DorsalOrigin: posterior lateral surface of the distal ulna Insertion: base of the distal phalanx of the thumb (dorsal side) Actions: Extension of the wristExtension of the thumbAbduction of the wristExtensor pollicus brevisExtension of thumb atExtension of thumb atcarpometacarpal carpometacarpal &&metacarpophalangealmetacarpophalangealjointsjointsWeak wrist extensionWeak wrist extensionWrist abductionWrist abductionExtensor indicis Location: Dorsal Origin: Insertion: Actions: – Extension of the 2nd phalange– Weak wrist extensionExtensor digiti minimi Location: Dorsal Origin: Lateral epicondyle of the humerus Insertion: Actions: Extension of the 5th phalange Weak wrist extensionAductor pollicis longusAbduction of the ThumbAbduction of the wristExtension of the thumbWeak flexion of the wristWhat do all the extensor muscles have in common?What do the following muscles have in common?Extensor carpi radialisExtensor carpi ulnarisExtensor digitorumWhat do the following pairs of muscles have in common besides their actionsFlexor carpi radialis and extensor carpi radialisFlexor carpi ulnaris and extensor carpi ulnarisNerves and ArteriesMedianAnterior and lateral muscles muscles of the forearm and radial side of hand UlnarAnterior and medial forearm and ulnar side of hand RadialPosterior
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