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Forelimb - Anatomy & Physiology (view source)
Revision as of 12:56, 15 August 2008
, 12:56, 15 August 2008→Muscles of the Carpal and Digital Joints
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====Muscles of the Carpal and Digital Joints====
====Muscles of the Carpal and Digital Joints====
+''Extensors'': Radial n. from the brachial plexus
+*Craniolateral position on the forearm
+*Almost all originate from the lateral epicondyle of the humerus
+*'''Extensor carpi radialis''': most medial, inserts on 2nd/3rd metacarpal bone
+*'''Ulnaris lateralis''': most lateral, inserts on accessory carpal bone
+*'''Extensor carpi obliquus''': aka '''abductor pollicis longus'''
+**Origin: cranial radius
+**Insertion: most medial metacarpal bone
+*Last two may also serve in medial deviation of the paw
+*'''Common Digital Extensor'''
+**Insertion: extensor process of the distal phalanx of each digit
+**Sends a medial branch to dewlcaw and medial digits in all but horse and cat
+*'''Lateral Digital Extensor'''
+**Insertion: dorsal proximal phalanx
+
+''Flexors'': Median or Ulnar n. of the brachial plexus
+*Caudal position on the forearm
+*Originate from the caaudal medial epicondyle of the humerus
+*'''Flexor carpi radialis''': most medial, inserts on upper 2nd/3rd metacarpal bone
+*'''Flexor carpi ulnaris''': most lateral, inserts on the accessory carpal bone
+*'''Superficial Digital Flexor'''
+**Branches according to the number of digis and inserts in proximal interphalangeal joint
+*'''Deep Digital Flexor'''
+**Passes through carpal canal before branching and continues to palmar distal phalanges
==Species Specifics==
==Species Specifics==