Muscles Flashcards
(80 cards)
Superficial pectoral m.
- origin: sternum
- termination: crest of greater tubercle and cranial humeral border
- action: adduct thoracic limb
Deep (ascending) pectoral
- origin: sternum
- termination: greater and lesser tubercles of humerus
- action: adduct thoracic limb and pull it caudally
Brachiocephalicus m.
- origin: clavicular intersection
- termination: distal cranial humerus, mastoid process of temporal bone, and dorsal midline of neck
- action: pull thoracic limb cranially (and/or) depress and pull head and neck laterally
Omotransversarius m.
- origin: wing of the atlas
- termination: distal spine of the scapula
- action: pull thoracic limb cranially (and/or) depress and pull head and neck laterally
Trapezius m.
- origin: cervical part - dorsal neck, thoracic part - dorsal thorax
- termination: spine of the scapula
- action: elevate the thoracic limb
Rhomboideus m.
- origin:
– thoracis: dorsal thorax
– cervicis: dorsal neck
– capitis: occipital bone - termination: dorsal border of scapula and/or scapular cartilage
- action: elevate the thoracic limb
Serratus ventralis m.
- origin: cervical vertebrae, thoracic wall
- termination: serrated face of scapula
- action: support and/or elevate the trunk
Latissimus dorsi m.
- origin: thoracolumbar fascia
- termination: teres major tuberosity
- action: draw the thoracic limb caudally, flex or extend the humeral joint
Sternocephalicus m.
- origin: sternum
- termination: mastoid process of temporal bone, occipital bone
- action: depress head and neck; draw head and neck laterally
Sternohyoideus m .
- origin: sternum
- termination: basihyoid bone
- action: pull tongue and larynx caudally
Sternothyroideus m.
- origin: cranial aspect of sternum
- termination: thyroid cartilage
- action: pull tongue and larynx caudally
Deltoideus m.
- origin: spine of scapula and acromion
- termination: deltoid tuberosity of humerus
- action: flex the humeral joint
- nerves: suprascapular and axillary nerves
- intrinsic lateral muscle of shoulder
Supraspinatus m.
- origin: supraspinous fossa of the scapula
- termination: greater tubercle of the humerus
- action: extend the humeral joint
- nerves: suprascapular and axillary nerves
- intrinsic lateral muscle of shoulder
Infraspinatus m.
- origin: infraspinous fossa of the scapula
- termination: greater tubercle of the humerus
- action: flex the humeral joint; abduct the limb at the humeral joint
- nerves: suprascapular and axillary nerves
- intrinsic lateral shoulder muscle
Teres minor m.
- origin: caudal border of scapula
- termination: teres minor tuberosity of the humerus
- action: flex the humeral joint
- nerves: suprascapular and axillary nerves
- intrinsic lateral muscle of shoulder
Subscapularis m.
- origin: subscapular fossa of the scapula
- termination: lesser tubercle of humerus
- action adduct limb at the humeral joint
- nerves: subscapular, axillary, and musculocutaneous
- intrinsic medial shoulder muscle
Teres major m.
- origin: caudal border of scapula
- termination: teres major tuberosity of humerus
- action: flex the joint
- nerves: subscapular, axillary, and musculocutaneous
- intrinsic medial shoulder muscle
Coracobrachialis m.
- origin: coracoid process of scapula
- termination: crest of the lesser tubercle of the humerus
- action: adduct limb at the shoulder
- nerves: subscapular, axillary, and musculocutaneous
- intrinsic medial shoulder muscle
Biceps brachii m .
- origin: supraglenoid tubercle
- termination: radial and ulnar tuberosities
- action: flex the cubital joint and extend the humeral joint
- nerves: musculocutaneous nerve
- intrinsic cranial brachium muscle
Brachialis m.
- origin: brachial groove of humerus
- termination: proximal radius and/or ulna
- action: flex the cubital joint
- nerves: musculocutaneous nerve
- intrinsic cranial brachial muscle
Triceps brachii m.
- origin: caudal border of scapula (long head), proximal humerus (other heads)
- termination: tuber olecrani
- action: extend the cubital joint (all heads), flex the humeral joint (long head)
- nerves: radial nerve
Tensor fasciae antebrachii m.
- origin: latissimus dorsi and fascia on caudal border of scapula
- termination: tuber olecrani
- action: extend the cubital joint (and tense the deep antebrachial fascia)
- nerves: radial nerve
Anconeus m.
- origin: caudal aspect of the distal humerus
- termination: tuber olecrani
- action: extend the cubital joint
- nerves: radial nerve
Extensor carpi radialis m.
- origin: lateral epicondyle of the humerus (and its crest)
- termination: dorsal base of second and third metacarpal bones
- action: extend the carpal joints
- nerves: radial nerve