Lab1 and 2 muscles

Question 1

Deltoid

Answer 1

Axillary from posterior of brachial plexus, posterior circumflex humeral, abducts arm, medially and laterally rotates arm. Flexes and extends arm

Question 2

Latissimus Dorsi

Answer 2

Thoracodorsal from posterior of brachial plexus, thoracodorsal artery, extends arm, medially rotates arm

Question 3

Levator scapulae

Answer 3

Dorsal scapular nerve, dorsal scapular artery, elevates scapula

Question 4

triceps brachii

Answer 4

radial nerve, deep brachial artery, extends forearm, longhead adducts and extends arm

Question 5

rhomboideus major

Answer 5

dorsal scapular nerve, dorsal scapular artery, retract, elevate and rotate scapula

Question 6

rhomboideus minor

Answer 6

dorsal scapular nerve, dorsal scapular artery, retract, elevate and rotate scapula

Question 7

serrates posterior inferior

Answer 7

ventral primary rami of spinal nerve T9-T12, intercostal and subcostal arteries, depress lower ribs

Question 8

serrates posterior superior

Answer 8

ventral primary rami of spinal nerves T2-T5, posterior intercostal artery, elevates upper ribs

Question 9

teres major

Answer 9

lower subcapular nerve (posterior cord of b. plexus), circumflex scapular artery, adducts arm, medially rotates arm, assist in arm extension

Question 10

teres minor

Answer 10

axillary nerve (posterior cord of b. plexus), circumflex scapular artery, laterally rotates arm

Question 11

trapezius

Answer 11

spinal accessory nerve (C3 and C4 nerves), transverse cervical artery, Rotates, elevates (superior part), retracts (middle part), and depresses (inferior part) scapula

Question 12

Erector spinae

Answer 12

dorsal primary rami of spinal nerve C1-S5, deep cervical artery - posterior intercostal and subcostal - lumbar artery, extends and laterally bends the trunk, neck and head

Question 13

iliocostalis

Answer 13

dorsal primary rami of spinal nerves C4-S5, deep cervical artery - posterior intercostal and subcostal and lumbar arteries, extends and laterally bends the trunk and neck

Question 14

longissimus

Answer 14

dorsal primary rami of spinal nerves C1-S1, deep cervical artery - posterior intercostal and subcostal and lumbar arteries, extends and laterally bends the trunk, neck and head

Question 15

Spinales

Answer 15

primary rami of C2-L3, deep cervical artery and posterior intercostal and subcostal and lumbar arteries, extends and laterally bends trunk and neck

Question 16

infraspinatus

Answer 16

suprascapular nerve, suprascapular artery, laterally rotates the arm

Question 17

splenius capitis

Answer 17

dorsal primary rami C2-C6, deep cervical artery and posterior intercostal artery, extends and laterally bends the neck and head, rotates head to the same side

Question 18

splenius cervicis

Answer 18

dorsal primary rami of C2-C6, deep cervical artery, posterior intercostal artery, extends and laterally bends neck and head, rotates head to the same side

Question 19

subscapularis

Answer 19

upper and lower sub scapular nerves, sub scapular artery, medially rotates the arm; assists extention of the arm

Question 20

supraspinatus

Answer 20

supra scapular nerve (from superior trunk b. plexus), supra scapular artery, abducts the arm (initiates abduction)

Question 21

multifidus

Answer 21

dorsal primary rami of C1-L5, deep cervical artery, posterior intercostal and subcostal and lumbar arteries, extend and laterally bend trunk and neck, rotate to opposite side

Question 22

rotatores

Answer 22

dorsal primary rami of C1-L5, deep cervcial artery, posterior intercostal and subcostal and lumbar arteries, rotates the vertebral column to the opposite side

Question 23

semispinalis Capitis

Answer 23

posterior rami of spinal nerves, extends and laterally rotates head to opposite side

Question 24

Semispinalis cervicis

Answer 24

posterior rami of spinal nerves, extends and laterally rotates neck to opposite side