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Canine Forelimb - Anatomy & Physiology (view source)
Revision as of 12:21, 25 August 2008
, 12:21, 25 August 2008→Extrinsic Musculature
'''''Brachiocephalic m.''''': Accessory n.
'''''Brachiocephalic m.''''': Accessory n.
*Two parts separated by the clavicle where it exists
*Two parts separated by the clavicle
*Origin: clavicle or vestigial fibrous intersection
*Origin: clavicle
*Insertion: several places on the head and neck
*Insertion: median raphe of the neck and the occipital bone. The ventral part attaches to the mastoid process
*Actions:
*Actions:
**advances the limb and extends the shoulder joint when limb is in motion
**advances the limb and extends the shoulder joint when limb is in motion
'''''Omotransversarius''''': Accessory n.
'''''Omotransversarius''''': Accessory n.
*Origin: transverse processes of the atlas
*Origin: transverse processes of the atlas
*Insertion: acromion and adjacent scapula
*Insertion: acromion and distal spine of the scapula
*Action: advancing the limb
*Action: advancing the limb
*Innervation
*Innervation
**caudal portion can advance the limb
**caudal portion can advance the limb
'''''Rhomboids''''': brachial plexus, although in some species, dorsal spinal nerves can innervate
'''''Rhomboids''''': brachial plexus
*Origin: median connective tissue from poll to withers, lying deep to the trapezius
*Origin: nuchal ligament, 4th - 6th thoracic spine
*Insertion: dorsal border and adjacent scapula
*Insertion: dorsal border and adjacent scapula
*Action: retracting the limb, may also raise limb
*Action: retracting the limb, may also raise limb