Actions, Origins, and Insertions Flashcards
Parts: Superficial pectoral m.
descending and transverse pectoral mm.)
Superficial pectoral m
Origin: sternum
Termination: crest of greater tubercle and cranial humeral border
Action: adduct the thoracic limb
Deep (ascending) pectoral m.
Origin: sternum.
Termination: greater and lesser tubercles of humerus.
Action: adduct thoracic limb and pull it caudally.
Parts: Brachiocephalicus
Cleidobrachialis
Cleidocephalicus
Brachiocephalicus m.
Origin: clavicular intersection.
Termination:
cleidobrachialis: distal cranial humerus
cleidocephalicus:
mastoid part: mastoid process of temporal bone
cervical part: 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
Parts: Rhomboideus
Rhomboideus throacis
Rhomboideus cervicis
Rhomboideus capitis
Rhomboideus m.
Origin:
rhomboideus thoracis: dorsal thorax
rhomboideus cervicis: dorsal neck
rhomboideus capitis: occipital bone
Termination: dorsal border of scapula and/or scapular cartilage
Action: elevate the thoracic limb
Parts: Serratus ventralis m.
Serratus ventralis cervicis
Serratus ventralis thoracis
Serratus ventralis m.
Origin:
serratus ventralis cervicis: cervical vertebrae
serratus ventralis thoracis: thoracic wall (ribs)
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 part: mastoid process of temporal bone
occipital part: 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
Supraspinatus m.
Origin: supraspinous fossa of the scapula
Termination: greater tubercle of the humerus
Action: extend the humeral joint
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
Teres minor m.
Origin: caudal border of 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
Action: flex the humeral joint
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: flex the cubital joint
Parts: Triceps brachii m
long, medial, and lateral heads in all species - carnivores also have an accessory head
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 (and tense the deep antebrachial fascia)
Anconeus m.
Origin: caudal aspect of the distal humerus
Termination: tuber olecrani
Action: extend the cubital joint
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
Common digital extensor m.
Origin: lateral epicondyle of the humerus
Termination: extensor processes of the distal phalanges
Action: extend the carpal and digital joints
Lateral digital extensor m.
Origin: lateral epicondyle of the humerus
Termination: distal phalanges (also the proximal and/or middle phalanges) of
lateral digit(s)
Action: extend the carpal joints and the digital joints of the lateral most digits
Extensor carpi ulnaris m. (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 (ulna)
Termination: medial 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
Parts: Flexor carpi ulnaris m.
2 heads: humeral and ulnar
Flexor carpi ulnaris m.
Origin: medial epicondyle and olecranon
Termination: accessory carpal bone
Action: flex the carpal joints