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Bovine Forelimb - Anatomy & Physiology (view source)
Revision as of 16:43, 6 January 2011
, 16:43, 6 January 2011→Muscles of the Shoulder
These muscles are grouped:
These muscles are grouped:
==1. Lateral==
'''Supraspinatus ''' and '''Infraspinatus''': Suprascapular n. of the brachial plexus.
Origin: the fossae of the scapula.
Insertion: both tubercles of the humerus.
Action: brace the shoulder.
Clinical significance: bursa between the tendon of the infraspinatus and lateral tubercle of the humerus can be the site of inflammation.
==2. Medial==
'''Supscapularis''': Subscapular n. from the brachial plexus.
Origin: Deep surface of the scapula.
Insertion: medial tubercle of the humerus.
Action: braces medial shoulder joint, potential adductor.
'''Coracobrachialis''': Musculocutaneous n. of the brachial plexus.
Origin: medial supraglenoid tubercle.
Insertion: proximal shaft of the humerus.
Action: fixator.
==Caudal (Flexors)==
'''Deltoids''': Axillary n. of the brachial plexus.
Origin: Two heads of origin; the caudal border and spine of the scapula and the acromion.
Insertion: deltoid tuberosity on the humerus.
Action: Flexor of Shoulder.
'''Teres Major''': Axillary n. of the brachial plexus.
Origin: dorsal part of the caudal scapula.
Insertion: teres tuberosity midway down humerus.
'''Teres Minor''': Axillary n. of the brachial plexus.
There are no defined extensors of the shoulder. Those involved (brachiocephalic m., biceps brachii, supraspinatus, and ascending pectorals) have other, more primary roles.
====Muscles of the Elbow====
====Muscles of the Elbow====