Muscles (O, I, A) P. 9-10

Question 1

M. serratus ventralis

Answer 1

O:
> pars cervicis - Proc. transversus of C2-7
> pars thoracis - middle of ribs 1-8 (laterally)

I: Facies serrata on scapula

A: Supports trunk, helps at inspiration, carries shoulder cran. / caud. depending on position of forelimb

Question 2

M. supraspinatus

Answer 2

O: Fossa supraspinata, margo cranialis, spina scapula

I: Tuberculum majus (humerus)

A: extensor of - and stabilizes shoulder

Question 3

M. infraspinatus

Answer 3

O: Fossa infraspinata, margo caudalis, spina scapula

I: Facies m. infraspinati of humerus

A: Flexor of shoulder, acts as lateral collateral lig. of shoulder

Question 4

M. deltoideus

Answer 4

O:
> pars scapularis - caudal edge of spina scapula
> pars acromialis (Ru, Car) - acromion

I: Tuberositas deltoidea (humerus)

A: Flexor of shoulder

Question 5

M. teres minor

Answer 5

O: Distally on margo caudalis, tuberculum infraglenoidale (Car)

I: Tuberositas teres minor (laterally) of humerus

A: Flexor of shoulder

Question 6

M. anconeus

Answer 6

O: Crista epicondylus lat. + around fossa olecrani

I: latero-prox. on olecranon (tuber olecrani, proc. anconeus)

A: Extensor of elbow joint

Question 7

M. subscapularis

Answer 7

O: Fossa subscapularis

I: Tuberculum minus (humerus)

A: Flexor & extensor of shoulder + medial collateral lig. of shoulder joint

Question 8

M. teres major

Answer 8

O: prox. on margo caud. + angulus caud. scapulae

I: Tuberositas teres major (humerus)

A: Flexor of shoulder

Question 9

M. tensor fasciae antebrachii

Answer 9

O: Detaching from M. latissimus dorsi

I: medially on tuber olecrani, radiates into fascia antebrachii

A: tenses antebrachial fascia + extends elbow

Question 10

M. triceps brachii

Answer 10

O:
> caput longum - distal 2/3 of margo caud.
> caput laterale - linea m. tricipitis
> caput mediale - proxomedial surface of humerus (near tuberositas teres major)
> caput acceccorium (Car) - caudally from collum humeri

I: Tuber olecrani

A: Extensor of elbow
~ Caput longum also flexes shoulder

Question 11

M. coracobrachialis

Answer 11

O: Proc. coracoideus (on tuberculum supraglenoidale)

I: Crista tubercoli minoris (behind caput mediale of M. triceps brachii)

A: Extensor of shoulder

Question 12

M. biceps brachii

Answer 12

O: Tuberculum supraglenoidale
(a transverse retinaculum fixes the tendon in sulcus intertubercularis)

I: Tuberositas radii et ulnae (just below proc. coronoideus med.)

A: Extends shoulder, flexes elbow

Question 13

M. brachialis

Answer 13

O: Caudally on collum humeri
(it will twist laterally, then cranio-medially in sulcus m. brachialis)

I: Tuberositas radii et ulnae (just below proc. coronoideus med.)

A: Flexor of elbow