Intrinsic Muscles of the Thoracic Limb Flashcards
*Lateral Muscles of the Scapula and Shoulder
____ from the spine and acromial process of the scapula to deltoid tuberosity; divided into distal and proximal parts:
deltoideus
distal part & proximal part
arises from acromnion and has fusiform shape
distal part
covers the infraspinatus; innervated by axillary nerve
proximal part
*Lateral Muscles of the Scapula and Shoulder
occupies the infraspinous fossa and is innervated by suprascapular nerve
infraspinatus
*Lateral Muscles of the Scapula and Shoulder
occupies the supraspinous fossa and is innervated by suprascapular nerve
supraspinatus
*Lateral Muscles of the Scapula and Shoulder
from infraglenoid tubercle to the teres minor tuberosity; a small, wedge-shaped muscle; innervated by axillary nerve
teres minor
extends the elbow and flexes the shoulder
deltoideus
flexion or extension depending on the location of the joint
infraspinatus
extends the shoulder
supraspinatus
flex the shoulder
teres minor
*Medial Muscles of the Scapula and Shoulder
occupies the entire subscapular fossa; innervated by subscapular nerve
subscapularis
*Medial Muscles of the Scapula and Shoulder
lies directly caudal to subscapularis; innervated by axillary nerve
teres major
*Medial Muscles of the Scapula and Shoulder
a small spindle-shaped muscle from coracoid process of the scapula to the crest of the lesser tubercle of the humerus; innervated by musculocutaneous nerve
coracobrachialis
adduct and extend the shoulder
subscapularis
flex and medially rotate the shoulder
teres major
stabilize the joint
coracobrachialis
*Caudal Muscles of the Arm
a thin strap that extends from latissimus dorsi to the olecranon
tensor fasciae antebrachii
*Caudal Muscles of the Arm
has 4 heads: long head, lateral head, medial head and accessory head.
triceps brachii
*Caudal Muscles of the Arm
a small muscle located almost completely in the olecranon fossa
anconeus
extends the elbow
tensor fascia antebrachii
extends the elbow and flexes the shoulder
triceps brachii
to extend the elbow
anconeus
*Cranial Muscles of the Arm
a fusiform muscle that lies on the medial and cranial surfaces of the humerus. It arises on the supraglenoid tuberosity and inserts on proximal ends of the radius and ulna; innervated by musculocutaneous nerve
biceps brachii
*Cranial Muscles of the Arm
lies in the brachialis groove of the humerus; innervated by musculocutaneous nerve
brachialis
extends the shoulder and flexes the elbow
biceps brachii
to flex the elbow
brachialis
*Cranial and Lateral Muscles of the Forearm
largest of the craniolateral antebrachial muscles; lies on the cranial surface of the radius; innervated by the radial nerve
extensor carpi radialis
*Cranial and Lateral Muscles of the Forearm
lies caudal to the extensor carpi radialis on the lateral side; has 4 individual tendons that leave the muscle; innervated by radial nerve
common digital extensor
*Cranial and Lateral Muscles of the Forearm
lies between common digital extensor and ulnaris lateralis; about half the size of common digital extensor; innervated by radial nerve
lateral digital extensor
*Cranial and Lateral Muscles of the Forearm
behind lateral digital extensor; the only flexor that arises from extensor group of muscles; innervated by radial nerve
ulnaris lateralis
*Cranial and Lateral Muscles of the Forearm
short, broad and flat, obliquely placed across the lateral side of the flexor surface of the elbow from the lateral epicondyle of the humerus to the cranial surface of the proximal fourth of the radius; innervated by the radial nerve
supinator
*Cranial and Lateral Muscles of the Forearm
extends obliquely across the medial surface of the elbow from the medial epicondyle of the humerus to the proximal middle 3rd of the radius; innervated by the median nerve
pronator teres
*Cranial and Lateral Muscles of the Forearm
lies primarily in the groove between radius and ulna and is triangular
abductor pollicis longus
supination
supinator
pronation
pronator teres
*Caudal and Medial Muscles of the Forearm
lies between the pronator teres cranially and
superficial digital flexor caudally; innervated by the median nerve
flexor carpi radialis
*Caudal and Medial Muscles of the Forearm
lies on the caudomedial side of the forearm
from the medial epicondyle of the humerus to the palmar surface of the
middle phalanges of digits I, II, III, IV and V; covers the deep digital
flexor; innervated by the median nerve
superficial digital flexor
*Caudal and Medial Muscles of the Forearm
has 2 heads: ulnar and humeral heads; ulnar
dead arises from caudal body of the proximal end of the ulna; humeral
head arises from medial epicondyle of humerus; lies cranial to the
ulnar head and inserts on the accessory carpal bone
flexor carpi ulnaris
*Caudal and Medial Muscles of the Forearm
humeral head has several bellies; xtends from
medial epicondyle of the humerus; ulnar head extends from caudal
border of the ulna and radial head which is the smallest extends from
medial border of the radius; innervated by the median and ulnar nerves
deep digital flexor
*Caudal and Medial Muscles of the Forearm
fills in the space between the radius and ulna; the
fibers of which run transversely; innervated by median nerve
pronator quadratus
