lab demo 1

Question 1

attachments of the subscapularis & function

Answer 1

medial to the scapula
spans the shoulder joint
attaches to the lesser tubercle

function: medial & lateral stability

Question 2

what does the subscapular nerve innervate?

Answer 2

subscapularis

Question 3

attachments of the supraspinatus & function

Answer 3

spans the supraspinous fossa of the scapula to the greater tubercle of the humerus

extends shoulder joint

Question 4

attachments of the infraspinatus & function

Answer 4

spans from the infraspinous fossa down to the greater tubercle

medial & lateral joint stability

Question 5

what does the suprascapular nerve innervate?

Answer 5

supraspinatus & infraspinatus

Question 6

attachments of the teres major & function

Answer 6

spans from the dorsocaudal border of the scapula down to the proximomedial aspect of the humerus

shoulder flexion

Question 7

attachments of the deltoideus & function

Answer 7

spans from scapular spine, down across the shoulder joint to the deltoid tuberosity

shoulder flexion

Question 8

what does the axillary n. innervate?

Answer 8

teres major & deltoideus

Question 9

attachments of biceps brachii & function

Answer 9

starts at the distal aspect of the scapula by the supraglenoid tubercle at attaches distally to the proximomedial aspect of the radius & ulna

elbow flexion

Question 10

attachments of the brachialis & function

Answer 10

starts at the caudal humerus & connects at the proximomedial aspect of the radius & ulna

elbow flexion

Question 11

what does the musculocutaneous nerve innervate?

Answer 11

biceps brachii & brachialis

Question 12

attachments of the triceps & function

Answer 12

originate from distocaudal border of the scapula & the proximal aspect of the humerus
travel down the caudal aspect of the brachium
insert at the olecranon tuber

elbow joint extension

Question 13

attachments of the antebrachial extensors & function

Answer 13

originate at the lateral epicondyle of the humerus
span across the dorsal aspect of carpal, metacarpophalangeal, & interphalangeal joints

carpal, metacarpophalangeal, interphalangeal joint extension

Question 14

what does the radial nerve innervate?

Answer 14

triceps & antebrachial extensors

Question 15

attachments of the antebrachial flexors & function

Answer 15

originate at the medial epicondyle
come across the palmar aspect of the carpal, metacarpophalangeal, & interphalangeal joints

carpal, metacarpophalangeal, & interphalangeal joint flexion

Question 16

what does the median & ulnar nerve innervate?

Answer 16

antebrachial flexors

Question 17

attachments of the serratus ventralis & function

Answer 17

originates at the dorsomedial aspect of the scapula
attaches to the transverse processes of the caudal cervical vertebrae & ribs 1-7

support the trunk between the thoracic limbs

Question 18

what does the long thoracic nerve innervate?

Answer 18

serratus ventralis

Question 19

attachments of the rhomboideus & function

Answer 19

originates at the dorsal border of the scapula
to the head, median raphe of neck, and spinous processes of cranial thoracic vertebrae

keeps dorsal aspect of the scapula against body

Question 20

what do the dorsal branches of cervical and thoracic spinal nerves innervate?

Answer 20

rhomboideus

Question 21

attachments of the trapezius & function

Answer 21

originates from scapular spine
attaches to the median raphe of the neck & supraspinous ligament from cranial thoracic vertebrae

keeps dorsal aspect of the scapula against body

Question 22

attachments of omotransversarius & function

Answer 22

spans the distal scapular spine to the wing of the atlas

limb protraction (pulling the limb cranially)

Question 23

attachments of the brachiocephalicus & function

Answer 23

spans from the head, medain raphe over cranial neck to the craniodistal humerus

limb protraction (pulling limb cranially)

Question 24

what does the accessory nerve innervate?

Answer 24

trapezius
omotransversarius
brachiocephalicus (cranial part)

Question 25

what does the braciocephalic nerve innervate?

Answer 25

distal part of the brachiocephalicus

Question 26

attachments of deep pectoral & function

Answer 26

length of the sternum to the proximocranial humerus

limb retraction (pulling limb caudally)

Question 27

attachments of the superficial pectorals & function

Answer 27

cranial sternebrae to proximocranial humerus

limb protraction (pulling limb cranially)

Question 28

what does the pectoral nerves innervate?

Answer 28

deep pectoral & superficial pectorals

Question 29

attachments of latissimus dorsi & function

Answer 29

spinous processes of thoracic & lumbar vertebrae
spans ribs 11-13
to proximomedial humeral shaft

limb retratction (pulling limb caudally)

Question 30

what does the thoracodorsal nerve innervate?

Answer 30

latissimus dorsi