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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
====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==