Muscle Origin Insertion Innervation Function/ movement
Omotransversarius Distal scapular spine Wing of atlas, Transverse Accessory nerve advance the limb; ex neck
processes of C1-2 laterally
clavicular intersection
Trapezius Scapular spine Cervical midline cranially and accessory nerve elevate and abduct limb
thoracic dorsal midline Axillary nerve
caudally
Rhomboideus Dorsal midline (capital, Proximomedial border of Ventral branches of cervical Elevate the limb; draw scapula
cervical and thoracic parts) scapular and thoracic spinal nerves against the trunk
dorsal branches of caudal
cervical nerve
Latissimus dorsi Teres major tuberosity on Thoracolumnar fascia and last Thoracodorsal nerve Retracts the limb and exes
caudal humerus 2-3 ribs the shoulder, draws trunk
forward over a xed limb
Brachiocephalicus distal end of humerus Mid dorsal raphe accessory nerve ventral Advance the limb, extend
a) Cleidobrachialis (cleidocervicalis branches of cervical spinal shoulder joint, draw head and
b) Cleidocephalicus Mastoid part of temporal bone nerves neck to side
Pectorals Super cial- rst 2-3 Super cial- greater tubercle Super cial- Cranial pectoral Super cial- adduct when not
sternebrae Deep- lesser tubercle and nerves bearing weight
Deep- whole sternum brachial fascia Deep- caudal pectoral nerves Deep- same as above and pull
trunk cranially and extend
shoulder
Serratus ventralis Lateral thoracic wall/neck Medial surface of the scapula ventral branches of cervical Support trunk and depress
ventrally spinal nerves and long scapula
thoracic Intershot by stout connective
tissue, helps support weight of
trunk
Subclavis Cranial part of sternum Epimysium Pectoral Complement the deep
pectorals
Supraspinatus Supraspinous fossa Greater tubercle of humerus suprascapular nerve Weak shoulder extensor,
lateral support
Infraspinatus Infraspinous fossa Greater tubercle of humerus suprascapular nerve Lateral support
*Equine
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Omotransversarius Distal scapular spine Wing of atlas, Transverse Accessory nerve advance the limb; ex neck
processes of C1-2 laterally
clavicular intersection
Trapezius Scapular spine Cervical midline cranially and accessory nerve elevate and abduct limb
thoracic dorsal midline Axillary nerve
caudally
Rhomboideus Dorsal midline (capital, Proximomedial border of Ventral branches of cervical Elevate the limb; draw scapula
cervical and thoracic parts) scapular and thoracic spinal nerves against the trunk
dorsal branches of caudal
cervical nerve
Latissimus dorsi Teres major tuberosity on Thoracolumnar fascia and last Thoracodorsal nerve Retracts the limb and exes
caudal humerus 2-3 ribs the shoulder, draws trunk
forward over a xed limb
Brachiocephalicus distal end of humerus Mid dorsal raphe accessory nerve ventral Advance the limb, extend
a) Cleidobrachialis (cleidocervicalis branches of cervical spinal shoulder joint, draw head and
b) Cleidocephalicus Mastoid part of temporal bone nerves neck to side
Pectorals Super cial- rst 2-3 Super cial- greater tubercle Super cial- Cranial pectoral Super cial- adduct when not
sternebrae Deep- lesser tubercle and nerves bearing weight
Deep- whole sternum brachial fascia Deep- caudal pectoral nerves Deep- same as above and pull
trunk cranially and extend
shoulder
Serratus ventralis Lateral thoracic wall/neck Medial surface of the scapula ventral branches of cervical Support trunk and depress
ventrally spinal nerves and long scapula
thoracic Intershot by stout connective
tissue, helps support weight of
trunk
Subclavis Cranial part of sternum Epimysium Pectoral Complement the deep
pectorals
Supraspinatus Supraspinous fossa Greater tubercle of humerus suprascapular nerve Weak shoulder extensor,
lateral support
Infraspinatus Infraspinous fossa Greater tubercle of humerus suprascapular nerve Lateral support
*Equine
fi fi fi fl fl
