Flashcards OIA of Thoracic Limb Muscles

origin of superficial pectoral (descending and transverse)

sternum

insertion of superficial pectoral (descending and transverse)

crest of greater tubercle and cranial humeral border

action of superficial pectoral (descending and transverse)

adduct thoracic limb

origin of deep (ascending) pectoral

sternum

insertion of deep (ascending) pectoral

greater and lesser tubercles of humerus

action of deep (ascending) pectoral

adduct thoracic limb and pull it caudally

origin of brachiocephalicus (cleidobrachialis and cleidocephalicus)

clavicular intersection

insertion of cleidobrachialis (brachiocephalicus)

distal cranial humerus

insertion of cleidocephalicus mastoid part (brachiocephalicus)

mastoid process of temporal bone

insertion of cleidocephalicus cervical part (brachiocephalicus)

dorsal midline of neck

action of brachiocephalicus

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

cranial most attachment of omotransversarius

wing of atlas

caudal most attachment of omotransversarius

distal spine of scapula

action of omotransversarius

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

origin of trapezius cervical part

dorsal neck

origin of trapezius thoracic part

dorsal thorax

insertion of trapezius

spine of scapula

action of trapezius

elevate the thoracic limb

origin of rhomboideus thoracic

dorsal thorax

origin of rhomboideus cervicis

dorsal neck

origin of rhomboideus capitis

nuchal crest of occipital bone

insertion of rhomboideus

dorsal border of scapula and/or scapular cartilage

action of rhomboideus

elevate thoracic limb

origin of serratus ventralis cervicis

cervical vertebrae

origin of serratus ventralis thoracis

thoracic wall (ribs)

insertion of serratus ventralis

serrated face of scapula

action of serratus ventralis

support and/or elevate the trunk

origin of latissimus dorsi

thoracolumbar fascia

insertion of latissimus dorsi

teres major tuberosity

action of latissimus dorsi

draw the thoracic limb caudally, flex or extend the humeral joint

extrinsic muscles of thoracic limb

-superficial pectoral

-deep pectoral

-brachiocephalicus

-omotransversarius

-trapezius

-rhomboideus

-serratus ventralis

-latissimus dorsi

origin of sternocephalicus

sternum

insertion of sternocephalicus mastoid part

mastoid process of temporal bone

insertion of sternocephalicus occipital part

occipital bone

action of sternocephalicus

depress head and neck, draw head and neck laterally

origin of sternohyoideus

sternum

insertion of sternohyoideus

basihyoid bone

action of sternohyoideus

pull tongue and larynx caudally

origin of sternothyroideus

cranial aspect of sternum or ribcage

insertion of sternothyroideus

thyroid cartilage

action of sternothyroideus

pull tongue and larynx caudally

muscles of ventral neck

-sternocephalicus

-sternohyoideus

-sternothyroideus

origin of deltoideus

spine of scapula and acromion

insertion of deltoideus

deltoid tuberosity of humerus

action of deltoideus

flex humeral joint

origin of supraspinatus

supraspinous fossa of scapula

insertion of supraspinatus

greater tubercle of humerus

action of supraspinatus

extend the humeral joint

origin of infraspinatus

infraspinous fossa of scapula

insertion of infraspinatus

greater tubercle of humerus

action of infraspinatus

flex humeral joint, abduct limb at humeral joint

origin of teres minor

caudal border of scapula

insertion of teres minor

teres minor tuberosity of humerus

action of teres minor

flex the humeral joint

intrinsic muscles of the thoracic limb - lateral muscles of the shoulder

-deltoideus

-supraspinatus

-infraspinatus

-teres minor

origin of subscapularis

subscapular fossa of scapula

insertion of subscapularis

lesser tubercle of humerus

action of subscapularis

adduct limb at humeral joint

origin of teres major

caudal border of scapula

insertion of teres major

teres major tuberosity of humerus

action of teres major

flex humeral joint

origin of coracobrachialis

coracoid process of scapula

insertion of coracobrachialis

crest of the lesser tubercle of the humerus

action of coracobrachialis

adduct limb at shoulder

intrinsic muscles of the thoracic limb - medial muscles of the shoulder

-subscapularis

-teres major

-coracobrachialis

origin of biceps brachii (one head - domestic animals)

supraglenoid tubercle

insertion of biceps brachii (one head - domestic animals)

radial and ulnar tuberosities

action of biceps brachii (one head - domestic animals)

flex the cubital joint and extend the humeral joint

origin of brachialis

brachial groove of humerus

insertion of brachialis

proximal radius and/or ulna

action of brachialis

flex the cubital joint

intrinsic muscles of the thoracic limb - cranial muscles of the brachium

-biceps brachii

-brachialis

intrinsic muscles of the thoracic limb - caudal muscles of the brachium

-triceps brachii

-tensor fasciae antebrachii

-anconeus

origin of triceps brachii long head

caudal border of scapula

origin of triceps brachii medial, lateral, and accessory heads

proximal humerus

insertion of triceps brachii

tuber olecranon

action of triceps brachii long head

flex humeral joint

action of triceps brachii long, medial, lateral, and accessory heads (all heads)

extend cubital joint

origin of tensor fasciae antebrachii

latissimus dorsi and associated fascia

insertion of tensor fasciae antebrachii

tuber olecranon

action of tensor fasciae antebrachii

extend cubital joint and tense deep antebrachial fascia

origin of anconeus

caudal aspect of distal humerus

insertion of anconeus

tuber olecranon

action of anconeus

extend cubital joint

intrinsic muscles of the thoracic limb - craniolateral antebrachial muscles

-extensor carpi radialis

-common digital extensor

-lateral digital extensor

-ulnaris lateralis

-supinator

-abductor pollicis longus

-brachioradialis

intrinsic muscles of the thoracic limb - caudomedial antebrachial muscles

-flexor carpi radialis

-flexor carpi ulnaris

-superficial digital flexor

-deep digital flexor

-pronator teres

-pronator quadratus

origin of extensor carpi radialis

lateral epicondyle of humerus and its crest

insertion of extensor carpi radialis

dorsal base of second and third metacarpal bones

action of extensor carpi radialis

extend carpal joints

origin of common digital extensor

lateral epicondyle of humerus

insertion of common digital extensor

extensor process of the distal phalanges

action of common digital extensor

extend the carpal and digital joints

origin of lateral digital extensor

lateral epicondyle of humerus

insertion of lateral digital extensor

distal phalanges (also proximal and/or middle phalanges) of lateral digits

action of lateral digital extensor

extend the carpal and digital joints of the lateral-most digits

origin of ulnaris lateralis

lateral epicondyle of humerus

insertion of ulnaris lateralis

accessory carpal bone and lateral base of fifth metacarpal bone

action of ulnaris lateralis

flex carpal joints and abduct the manus

origin of supinator

lateral epicondyle of humerus

insertion of supinator

body of radius