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Forelimb - Anatomy & Physiology (view source)
Revision as of 11:35, 26 August 2008
, 11:35, 26 August 2008→Innervation of the Forelimb
==Innervation of the Forelimb==
==Innervation of the Forelimb==
The nerves affecting the forelimb arise from spinal nerves C6 to T2 and pass through the '''brachial plexus'''.
'''Suprascapular Nerve'''
* Origin - cranial part of brachial plexus, C6 and C7
* Motor innervation - supraspinatus and infraspinatus
* Sensory innervation - none
* Route - out of the brachial plexus, laterally round the cranial aspect of the neck of the scapula
'''Subscapular Nerve'''
* Origin - cranial part of the brachial plexus, C6 and C7
* Motor innervation - subscapular muscle
* Sensory innervation - none
* Route - direct to muscle
'''Musculocutaneous Nerve'''
* Origin - middle part of the brachial plexua, C7 and C8 (sometimes C6)
* Motor innervation - Biceps brachii, brachialis, coracobrachialis
* Sensory innervation - dorsomedial aspect of forelimb
* Route - medial aspect of the limb, close to the median nerve
'''Axillary Nerve'''
* Origin - middle brachial plexus, C7 and C8
* Motor innervation - shoulder flexors, teres minor, deltoid
* Sensory innervation - dorso-lateral aspect of proximal limb
* Route - behind the shoulder joint
'''Radial Nerve'''
* Origin - caudal brachial plexus, C7 to T2
* Motor innervation - extensors of elbow, carpus and digits
* Sensory innervation - dog: craniolateral and medial forearm, horse: lateral forearm
* Route - through the triceps, around the humerus to the lateral aspect of the forearm
'''Median and Ulnar Nerves'''
* Origin - caudal brachial plexus, C8, T1 and T2
* Motor innervation - flexors of carpus and digits
* Sensory innervation - caudal aspect of the limb
* Route - along the medial aspect of the limb, the median forms branches to the musculocutaneous nerve
==Species Specifics==
==Species Specifics==
===[[Canine Forelimb - Anatomy & Physiology|Canine Forelimb]]===
===[[Canine Forelimb - Anatomy & Physiology|Canine Forelimb]]===
===[[Equine Forelimb - Anatomy & Physiology|Equine Forelimb]]===
===[[Equine Forelimb - Anatomy & Physiology|Equine Forelimb]]===
===[[Bovine Forelimb - Anatomy & Physiology|Bovine Forelimb]]===
===[[Bovine Forelimb - Anatomy & Physiology|Bovine Forelimb]]===