Origins, Terminations, Actions: Pectorals-Sternos

Origin of the superficial pectoral m.?

Sternum

Termination of the superficial pectoral m.?

Greater tubercle

Action of the superficial pectoral m.?

Adduct the thoracic limb

Origin of the deep pectoral m.?

Sternum

Termination of the deep pectoral m.?

Greater + lesser tubercles

Action of the deep pectoral m.?

Adduct thoracic limb + pull it caudally

Origin of the brachiocephalicus m.?

Clavicular intersection

Termination of the brachiocephalicus m.?

Humerus, skull, neck

Action of the brachiocephalicus m.?

Pull thoracic limb cranially and/or depress + pull head + neck laterally

Origin of the omotransversarius m.?

Wing of atlas

Termination of the omotransversarius m.?

Distal spine of scapula

Action of the omotransversarius m.?

Pull thoracic limb cranially and/or depress and pull head and neck laterally

Origin of the trapezius m.?

Cervical part: dorsal neck; thoracic part: dorsal thorax

Termination of the trapezius m.?

Spine of scapula

Action of the trapezius m.?

Elevate thoracic limb

Termination of the rhomboideus m.?

Dorsal border of scapula

Action of the rhomboideus m.?

Elevate thoracic limb (never labeled)

Origin of the serratus ventralis m.?

Cervical vertebrae, thoracic wall

Termination of the serratus ventralis m.?

Serrated face of scapula

Action of the serratus ventralis m.?

Support and/or elevate the trunk

Origin of the latissimus dorsi m.?

Thoracolumbar fascia

Action of the latissimus dorsi m.?

Draw the limb caudally, flex or extend humeral joint

Origin of the sternocephalicus m.?

sternum

Termination of the sternocephalicus m.?

Bones of skull

Action of the sternocephalicus m.?

Depress head + neck; draw head + neck laterally

Origin of the sternohyoideus m.?

Sternum.

Termination of the sternohyoideus m.?

Basihyoid bone

Origin of the sternothyroideus m.?

Cranial aspect of sternum

Termination of the sternothyroideus m.?

Thyroid cartilage