Origins & Insertions Flashcards
Superficial pectoral m.
Origin: sternum
Termination: crest of greater tubercle and cranial humeral border
Action: adduct the thoracic limb
Deep pectoral m.
Origin: sternum
Termination: greater and lesser tubercles of humerus
Action: adduct thoracic limb and pull it caudally
Brachiocephalicus m.
Origin: clavicular intersection
Termination: humerus, skull, neck
Action: pull thoracic limb cranially (and/or) depress and pull head and neck laterally
Omotransversarius m.
Origin: wing of the atlas
Termination: spine of the scapula
Action: pull thoracic limb cranially (and/or) depress and pull head and neck laterally
Trapezius m.
Origin: neck
Termination: spine of the scapula
Action: elevate the thoracic limb
Rhomboideus m.
Origin: don’t need to know
Termination: dorsal border of scapula
Action: elevate the thoracic limb
Serratus ventralis m.
Origin: cervical vertebrae, ribs
Termination: serrate 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
Deltoideus m.
Origin: spine of scapula and acromoin
Termination: deltoid tuberosity of humerus
Action: flex the humeral joint
Supraspinatus m.
Origin: supraspinous fossa of the scapula
Termination: greater tubercle of the humerus
Action: extend the humeral joint
Infraspinatus
Origin: infraspinous fossa of the scapula
Termination: greater tubercle of the humerus
Action: flex the humeral joint, abduct the limb at the humeral joint
Teres minor m.
Origin: caudal border of the scapula
Termination: teres minor tuberosity of the humerus
Action: flex the humeral joint
Subscapularis m.
Origin: subscapular fossa of scapula
Termination: lesser tubercle of humerus
Action: adduct limb at humeral joint
Teres major m.
Origin: caudal border of scapula
Termination: teres major tuberosity of humerus
Coracobrachialis m.
Origin: coracoid process of scapula
Termination: crest of the lesser tubercle of the humerus
Action: adduct limb at shoulder
Biceps brachii m.
Origin: supraglenoid tubercle
Termination: radial and ulnar tuberosities
Action: flex the cubital joint and extend the humeral joint
Brachialis m.
Origin: brachial groove of humerus
Termination: proximal radius and/or ulna
Action: flext the cubital joint
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)
Tensor fasciae antebrachii m.
Origin: latissimus dorsi and fascia on caudal border of scapula
Termination: tuber olecrani
Action: extend the cubital joint
Anconeus m.
Origin: caudal aspect of distal humerus
Termination: tuber olecrani
Action: extend the cubital joint
Extensor carpi radialis m.
Origin: lateral epicondyle of the humerus
Termination: dorsal base of second and third metacarpal bones
Action: extend the carpal joints and flex the cubital joint
Common digital extensor m.
Origin: lateral epicondyle of the humerus
Termination: extensor processes of distal phalanges
Action: extend the carpal and digital joints
Lateral digital extensor m.
Origin: lateral epicondyle of the humerus
Termination: distal phalanges
Action: extend the carpal joints and the digital joints of the lateral most digits
Ulnaris lateralis m.
Origin: lateral epicondyle of the humerus
Termination: accessory carpal bone and lateral base of fifth metacarpal bone
Action: flex the carpal joints, abduct the manus
Supinator m.
Origin: lateral epicondyle of the humerus
Termination: body of radius
Action: supination of the manus
Abductor pollicis longus m.
Origin: proximal antebrachium
Termination: medical metacarpus
Action: abduct the first digit
Brachioradialis m.
Origin: lateral epicondyle of the humerus
Termination: fascia near the carpus
Action: flexes the cubital joint and supinates the manus
Flexor carpi radialis m.
Origin: medial epicondyle of the humerus
Termination: palmar base of metacarpal bones 2 and 3
Action: flex the carpal joints
Flexor carpi ulnaris m.
Origin: medial epicondyle and olecranon
Termination: accessory carpal bone
Action: flex the carpal bones
Superficial digital flexor m.
Origin: medical epicondyle of the humerus
Termination: middle phalanges of the digits
Action: flex the carpal joints, metacarpophalangeal and proximal interphalangeal joints
Deep digital flexor m.
Origin: humerus, radius, ulna
Termination: flexor tubercles of distal phalanges
Action: flex the carpal and digital joints
Pronator teres m.
Origin: medical epicondyle of the humerus
Termination: medial body of radius
Action: weak elbow flexion and weak pronation of the manus
Pronator quadratus m.
Attachments; apposed surfaces of the radius and the ulna
Action: pronation of the manus
