Thoracic Limb Muscles

Question 1

what is the innervation and action of the trapezius (cervical and thoracic)?

Answer 1

accessory and dorsal spinal nerves
elevate shoulder, pull limb cranial for cervical, caudal for thoracic, dorsal flexion neck

Question 2

what is the innervation and action of the rhomboideus (cervical and thoracic)?

Answer 2

dorsal spinal nerves
pull scapula cranial and dorsal, dorsal flexion neck
pig has capitis part too

Question 3

what is the innervation and action of the lattissimus dorsi?

Answer 3

thoracodorsal
pull humerus caudal/dorsal, flex shoulder, draw trunk cranially

Question 4

what is the innervation and action of the brachiocephalicus (occiptal and mastoid)?

Answer 4

accessory, axillary, and ventral branches
limb cranially, extend shoulder joint, dorsal flexion neck, extension head, incline head and neck

Question 5

what is the innervation and action of the subclavius?

Answer 5

cranial pectoral
suspend trunk and stabilize shoulder joint

Question 6

what is the innervation and action of the descending pectoral?

Answer 6

cranial pectoral
adduct limb, advance thorax

Question 7

what is the innervation and action of the transverse pectoral?

Answer 7

cranial pectoral
adduct limb, tense forearm fascia

Question 8

what is the innervation and action of the ascending pectoral?

Answer 8

caudal pectoral
adduct limb and retract, draw trunk cranially

Question 9

what is the innervation and action of the omotransversarius?

Answer 9

accessory
pull limb cranially, extend shoulder, neck laterally and ventrally

Question 10

what is the innervation and action of the serratus ventralis (cervicis and thoracis)?

Answer 10

accessory, C: dorsal spinal branches
suspend trunk, dorsal flexion neck, support in inspiration

Question 11

what is the innervation and action of the deltoideus (scapular and acromial)?

Answer 11

axillary
flex and abduct shoulder

Question 12

what is the innervation and action of the supraspinatus?

Answer 12

suprascapular
extend shoulder

Question 13

what is the innervation and action of the infraspinatus?

Answer 13

suprascapular
abduct and rotate shoulder and extend

Question 14

what is the innervation and action of the subscapularis?

Answer 14

subscapular
adduct limb

Question 15

what is the innervation and action of the teres major?

Answer 15

axillary
flex shoulder and adduct limb

Question 16

what is the innervation and action of the teres minor?

Answer 16

axillary
flex shoulder and abduct limb

Question 17

what is the innervation and action of the articularis humeri?

Answer 17

axillary
flex shoulder

Question 18

what is the innervation and action of the biceps brachii?

Answer 18

musculocutaneous
flex elbow and extend shoulder

Question 19

what is the innervation and action of the brachialis?

Answer 19

musculocutaneous
flex elbow

Question 20

what is the innervation and action of the coracobrachialis?

Answer 20

musculocutaneous
adduct and flex shoulder

Question 21

what is the innervation and action of the triceps brachii (long, medial, lateral)?

Answer 21

radial
extend elbow and long flexes shoulder

Question 22

what is the innervation and action of the anconeus?

Answer 22

radial
elbow extension, avoid joint capsule being pinched

Question 23

what is the innervation and action of the tensor fasciae antebrachii?

Answer 23

radial
extend elbow, tense fascia and flex shoulder

Question 24

what is the innervation and action of the extensor carpi radialis?

Answer 24

radial
extend carpal joint, flex elbow

Question 25

what is the innervation and action of the common digital extensor?

Answer 25

radial extend carpal, metacarpophalangeal, proximal and distal intercarpophalangeal joints, flex elbow

Question 26

what is the innervation and action of the lateral digital extensor?

Answer 26

radial extend carpal, metacarpophalangeal, proximal and distal interphalangeal joints

Question 27

what is the innervation and action of the ulnaris lateralis?

Answer 27

radial flex carpal joint, extend elbow

Question 28

what is the innervation and action of the carpal oblique extensor?

Answer 28

radial extend carpal joint

Question 29

what is the innervation and action of the flexor carpi radialis?

Answer 29

median flex carpal joint, extend elbow

Question 30

what is the innervation and action of the flexor carpi ulnaris (humeral and ulnar)?

Answer 30

ulnar flex carpal joint, humeral: extend elbow

Question 31

what is the innervation and action of the deep digital flexor (ulnar, humeral, radial)?

Answer 31

radial and humeral: median ulnar: ulnar flex carpal, metacarpophalangeal, proximal and distal interphalangeal joints, humeral: extend elbow

Question 32

what is the innervation and action of the superficial digital flexor (humeral and radial)?

Answer 32

ulnar flex carpal, metacarpophalangeal, proximal and distal interphalangeal joints, extend elbow

Question 33

what are the attachments of the trapezius?

Answer 33

cervical: funicular part nuchal ligament thoracic: supraspinatous ligament spine scapula

Question 34

what are the attachments of the rhomboideus?

Answer 34

cervical: funicular part nuchal ligament thoracic: spinous process medial surface cartilage scapula

Question 35

what are the attachments of the lattissimus dorsi?

Answer 35

thoracolumbar fascia teres major tuberosity

Question 36

what are the attachments of the subclavius?

Answer 36

sternum and first four costal cartilages shoulder fascia, supraspinatous fascia, cranial border scapula

Question 37

what are the attachments of the deltoideus?

Answer 37

spine and caudal border scapula deltoid tuberosity

Question 38

what are the attachments of the supraspinatous?

Answer 38

supraspinatous fossa lesser and greater tubercles humerus

Question 39

what are the attachments of the infraspinatous?

Answer 39

infraspinatous fossa greater tubercle humerus

Question 40

what are the attachments of the subscapularis?

Answer 40

subscapular fossa lesser tubercle

Question 41

what are the attachments of the teres major?

Answer 41

caudal angle scapula teres major tuberosity

Question 42

what are the attachments of the teres minor?

Answer 42

caudal border distal scapula teres minor tuberosity

Question 43

what are the attachments of the articularis humeri?

Answer 43

proximal to glenoid cavity neck humerus

Question 44

what are the attachments of the biceps brachii?

Answer 44

supraglenoid tubercle lots of places

Question 45

what are the attachments of the brachialis?

Answer 45

neck humerus medial radius and medial collateral ligament

Question 46

what are the attachments of the coracobrachialis?

Answer 46

coracoid process proximal to teres major tuberosity

Question 47

what are the attachments of the tensor fasciae antebrachii?

Answer 47

tendon lattissimus dorsi forearm fascia

Question 48

what is the proximal attachment of all of the carpal extensors except lateral digital extensor and carpal oblique extensor?

Answer 48

lateral epicondyle