1,351
edits
Changes
Jump to navigation
Jump to search
Forelimb - Anatomy & Physiology (view source)
Revision as of 14:38, 14 August 2008
, 14:38, 14 August 2008→Extrinsic Musculature Forelimb
'''''Pectoral mm.'''''
'''''Pectoral mm.'''''
*Two parts, cranial and caudal
*Two superficial parts, cranial and caudal
*Origin: cranial sternum
**Origin: cranial sternum
*Insertion:
**Insertion:
**cranial ('''descending'''): crest of the humerus distal to the deltoid tuberosity
***cranial ('''descending'''): crest of the humerus distal to the deltoid tuberosity
**caudal ('''transverse'''): covers elbow joint to insert on the medial fascia of the forearm
***caudal ('''transverse'''): covers elbow joint to insert on the medial fascia of the forearm
*Action: adduct the forelimb, assist in protraction and retraction
**Action: adduct the forelimb, assist in protraction and retraction
*Innervation: local branches of the brachial plexus
*One deep part ('''pectoralis profundus'''), with cranial and caudal parts
**Origin: ventral sternum and adjacent cartilage
**Insertions:
***cranial (subclavius): supraspinatus m.
***caudal (pectoralis ascendens): lesser tubercle of the humerus
**Actions:
***slinging trunk between forelimbs
***may also retract free limbs
***draw trunk forward when limb is fixed
*Innervation: brachial plexus
'''''Serratis ventralis'''''
'''''Serratis ventralis'''''