Lab List 1: muscles

Question 1

Trapezius

Answer 1

Action: elevates, depresses, retracts scapula
Innervation: accessory nerve
Blood supply: transverse cervical
Antagonist: serratus anterior and latissimus dorsi

Question 2

Latissimus dorsi

Answer 2

Action: extends and rotates the arm medically along with addiction of the arm
Innervation: thoracodorsal nerve
Blood supply: thoracodorsal artery
Antagonist: deltoid and trapezius

Question 3

Rhomboideus major

Answer 3

Action: retract, elevate, and rotate scapula inferiorly
Innervation: dorsoscapular
Blood supply: dorsoscapular
Antagonist: serratus anterior

Question 4

Rhomboideus minor

Answer 4

Action: retract, elevate, and rotate scapula inferiorly
Innervation: dorsoscapular
Blood supply: dorsoscapular
Antagonist: serratus anterior

Question 5

Levator scapula

Answer 5

Action: elevate scapula
Innervation: dorsal scapular
Blood:dorsal scapular
Antagonist: latissimus dorsi, pectoralis major minor, serratus anterior

Question 6

Serratus posterior superior

Answer 6

Action: elevate the upper rib
Innervation: T1-T4
Blood: posterior intercostals 1-4
Antagonist: serratus

Question 7

Serratus posterior inferior

Answer 7

Action: depress ribs 9-12, may prevent lower ribs from being elevated when diaphragm contracts
Innervation: T9-T12
Blood: lowest posterior intercostal, subcostal, first two lumbar
Antagonist:

Question 8

Iliocostalis

Answer 8

Action:extend and laterally bend the trunk and neck
Innervation: C4-S5
Blood supply: deep cervical, posterior intercostal, subcostal, lumbar
Antagonist: recurs abdominus

Question 9

Longissimus

Answer 9

Action: extend and laterally bend the trunk neck and head
Innervation: C1-S1
Blood: deep cervical, posterior intercostal, subcostal, lumbar
Antagonist: rectus abdominus

Question 10

Spinalis

Answer 10

Action: extends and laterally bends trunk and neck
Innervation:C2-L3
Blood: deep cervical, posterior intercostal, subcostal, lumbar
Antagonist: rectus abdominus