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Gross Anatomy

Thoracic Limb Nerves

ConceptExplanation
(T/F) Damage to a spinal nerve will result in loss or decreased innervation below the level of the damage True
Brachial Plexus composed of ventral branches of spinal nerves
(T/F) The spinal nerve that supplies motor innervation to a specific segment of the limb usually supplies sensory innervation to the next distal adjacent segment of the limb True
Cranial pectoral nerve Innervates superficial pectoral muscle
Caudal pectoral nerve innervates deep pectoral muscle
Suprascapular nerve Innervates supraspinatus & infraspinatus muscle
Subscapular nerve Innervates subscapularis muscle
Thoracodorsal nerve Innervates the latissimus dorsi muscle
Lateral thoracic nerve Innervates the cutaneus trunci muscle
Long thoracic nerve Innervates the serratus ventralis thoracis muscle
Axillary nerve Provides motor innervation to teres major, teres minor & deltoideus, and sensory innervation (*via cranial cutaneous antebrachial n.) to the craniolateral surface of brachium & antebrachium b/w acromial head of triceps brachii m. and the cubital joint.
Musculocutaneous nerve Provides motor innervation to the coracobrachialis, biceps brachii & brachialis muscles, and sensory innervation to the craniomedial surface of antebrachium between the cubital joint and carpus via the medial cutaneous antebrachial nerve
Radial nerve Provides motor innervation to the triceps brachii, tensor fasciae antebrachii, and sensory innervation to the craniolateral surface of the antebrachium and dorsum of the manus via the lateral & medial branches of the superficial branch of the radial nerve
Ulnar nerve Provides motor innervation to ulnar & humeral heads of DDF, & short portion of medial head of triceps brachii (cats) m., & sensory innervation (*via caudal cutaneous antebrachial n.) to caudomedial surface of antebrachium & carpus
Median nerve. Provides motor innervation to the flexor carpi radialis, humeral & radial heads of DDF, SDF mm., and sensory innervation to the palmar surface of digits I-IV & axial surface of digit V
Autonomous zone an area of skin that is provided sensory innervation by a single spinal nerve
Cutaneous zone an area of skin that is supplied by sensory innervation by more than one spinal nerve (overlapping zone of innervation)
Created by: satya.benoit
 

 



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