intrinsic muscles of the forelimb Flashcards
what intrinsic muscles are in the lateral scapula and shoulder
deltoideus
infraspinatus
teres minor
supraspinatus
origin of the deltoideus
spine of the scapula and acromion process of the scapula
insertion of the deltoideus
deltoid tuberosity of humerus
innervation of the deltoideus
axillary nerve
function of the deltoideus
flexes the shoulder
origin of the infraspinatus
infraspinous fossa
insertion of the infraspinatus
greater tubercle of humerus
innervation of the infraspinatus
suprascapular
action of the infraspinatus
extends and flexes the shoulder
origin of the teres minor
infraglenoid tubercle and distal third of the caudal border of the scapula
insertion of the teres minor
teres minor tuberosity of the humerus
innervation of the teres minor
axillary nerve
function of the teres minor
flexes the shoulder also rotate shoulder laterally and prevent medial rotation during weight bearing
origin of the supraspinatus
supraspinous fossa
insertion of the supraspinatus
greater tubercle of the humerus via the thick tendon
innervation of the supraspinatus
suprascapular nerve
function of the supraspinatus
extends and stabilizes shoulder
what are the muscles in the medial scapula and shoulder
subscapularis
teres major
coracobrachialis
origin of the subscapularis
subscapular fossa of the scapula
insertion of the subscapularis
lesser tubercle of the humerus
innervation of the subscapularis
axillary and subscapular
function of the subscapularis
extends, adducts and medially stabilizes the shoulder
origin of the teres major
caudal border and angle of the scapula
insertion of the teres major
teres major tuberosity of the humerus
innervation of the teres major
axillary
function of the teres major
flexes the shoulder, allows medial rotation and prevents lateral rotation of the shoulder
origin of the coracobrachialis
coracoid process of the scapula
insertion of the coracobrachialis
lesser tubercle of the humerus
innervation of the coracobrachialis
musculotcutaneous nerve
function of the coracobrachialis
extends shoulder and adducts limb and stabilises the shoulder.
what are the muscles in the caudal arm
tensor fasciae antebrachii
triceps brachii - has 4 heads:
long head
lateral head
accessory head
medial head
anconeus
origin of the tensor fasciae antebrachii
fascia covering the lateral side of the lattissmus dorsi
insertion of the tensor fasciae antebrachii
olecranon
innervation of the tensor fasciae antebrachii
radial nerve
function of the tensor fasciae antebrachii
extends the elbow
origin of the long head of the triceps brachii
caudal border of scapula
insertion of the long head of the triceps brachii
olecranon tuber
innervation of the long head of the triceps brachii
radial n
function of the long head of the triceps brachii
extends elbow and flexes shoulder
origin of the lateral head of the triceps brachii
deltoid tuberosity/tricipital line of humerus
insertion of the lateral head of the triceps brachii
olecranon tuber
innervation of the lateral head of the triceps brachii
radial
function of the lateral head of the triceps brachii
extends elbow
origin of the accessory head of the triceps brachii
neck of the humerus
insertion of the accessory head of the triceps brachii
olecranon tuber
innervation of the accessory head of the triceps brachii
radial nerve
function of the accessory head of the triceps brachii
extends elbow
origin of the medial head of the triceps brachii
proximal humerus near teres major tuberosity
insertion of the medial head of the triceps brachii
olecranon tuber
innervation of the medial head of the triceps brachii
radial
function of the medial head of the triceps brachii
extends elbow
origin of the anconeus
supracondylar crest and lateral and medial epicondyles of humerus
insertion of the anconeus
lateral olecranon
innervation of the anconeus
radial
function of the anconeus
extends elbow
raises joint capsule to prevent capsules compression during extension of elbow.
what are the muscles in the cranial arm
biceps brachii
brachialis
origin of the biceps brachii
supraglenoid tubercle
insertion of the biceps brachii
cranial aspect of proximal medial radius/ulna
innervation of the biceps brachii
musculocutaneous
function of the biceps brachii
extends shoulder and flexes elbow
origin of the brachialis
proximal lateral surface of the humerus
insertion of the brachialis
proximal medial radius/ulna
innervation of the brachialis
musculocutaneous
function of the brachialis
flexes elbow
what are the muscles in the cranial and lateral forearm
extensor carpi radialis
common digital extensor
lateral digital extensor
ulnaris lateralis
supinator
abductor digiti longus
origin of the extensor carpi radialis
lateral supracondylar crest of the humerus
insertion of the extensor carpi radialis
proximodorsal surface of metacarpal ii and iii
innervation of the extensor carpi radialis
radial
function of the extensor carpi radialis
extends carpus
origin of the common digital extensor
lateral epicondyle of the humerus
insertion of the common digital extensor
extensor processes of the distal phelanges if ii, iii, iv and v digits
innervation of the common digital extensor
radial
function of the common digital extensor
extends carpus and digits
origin of the lateral digital extensor
lateral epicondyle of the humerus
insertion of the lateral digital extensor
proximal end of all phalanges of digits ii,iv and v
innervation of the lateral digital extensor
radial
function of the lateral digital extensor
extends capus and joints of digits iii, iv and v
origin of the ulnaris lateralis
lateral epicondyle of the humerus
insertion of the ulnaris lateralis
accessory carpal bone and lateral aspect of metacarpal iv
innervation of the ulnaris lateralis
radial
function of the ulnaris lateralis
abduct the carpal joint also flex the carpal joints and supports carpus when extended.
origin of the supinator
lateral epicondyle of the humerus
insertion of the supinator
proximonocranial surface of radius
innervation of the supinator
radial
function of the supinator
rotates forearm laterally and flexes the elbow
origin of the abductor digiti longus
craniolateral surface of the ulna
insertion of the abductor digiti longus
proximal end of metacarpal i and ii
innervation of the abductor digiti longus
radial
function of the abductor digiti longus
extends the carpus
abducts the first digit or pollex
what muscles are in the caudal and medial forearm
pronator teres
flexor carpi radials
superficial digital flexor
flexor carpi ulnaris - humeral and ulnar head
deep digital flexor - humeral, ulnar and radial
pronator quadratus
interosseous
origin of the pronator terres
medial epicondyle of the humerus
insertion of the pronator teres
proximal medial border of the radius
innervation of the pronator teres
median nerve
function of the pronator teres
rotate the forearm medially also flexes the elbow
origin of the flexor carpi radialis
medial epicondyle of the humerus
insertion of the flexor carpi radialis
palmar aspect of the metacarpals ii and iii
innervation of the flexor carpi radialis
median nerve
function of the flexor carpi radialis
flexes the carpus
origin of the superficial digital flexor
medial epicondyle of the humerus
insertion of the superficial digital flexor
palmar aspect of the middle phalanx on all digits
innervation of the superficial digital flexor
median nerve
function of the superficial digital flexor
extends elbow, flexes carpus and flexes digit
origin of the flexor carpi ulnaris - humeral head
medial epicondyle of the humerus
insertion of the flexor carpi ulnaris - humeral head
accessory carpal bone
innervation of the flexor carpi ulnaris - humeral head
ulnar nerve
function of the flexor carpi ulnaris - humeral head
flexes the carpus
origin of the flexor carpi ulnaris - ulnar head
caudo medial border of the olecranon
insertion of the flexor carpi ulnaris - ulnar head
accessory carpal bone
innervation of the flexor carpi ulnaris - ulnar head
ulnar nerve
function of the flexor carpi ulnaris - ulnar head
flexes the carpus
origin of the deep digital flexor - humeral head
medial epicondyle of the humerus
insertion of the deep digital flexor - humeral head
flexor surface of the distal phalanx (3rd)
innervation of the deep digital flexor - humeral head
median and ulnar
function of the deep digital flexor - humeral head
extends elbow and flexes carpus and digit
origin of the deep digital flexor - ulnar head
proximal caudal border of the ulna
innervation of the deep digital flexor - ulnar head
ulnar
origin of the deep digital flexor - radial head
medial border of the radius
innervation of the deep digital flexor - radial head
median
origin of the pronator quadratus
fills space between radius and ulna
insertion of the pronator quadratus
apposed surface of the radius and ulna
innervation of the pronator quadratus
median
function of the pronator quadratus
pronate the paw
origin of the interosseous
base of respective metacarpal bone (ii,iii,iv and v)
insertion of the interosseous
metacarpophalangeal joint
innervation of the interosseous
deep branch of ulnar nerve
function of the interosseous
flexes metacarpophalangeal joints, fetlock (ii,iii,iv and v)