PAS 610 MUSCLES OF THE BACK ACTUAL EXAM | COMPLETE AND GRADED
QUESTIONS AND ANSWERS 2026 LATEST UPDATED | 100% GRADED CORRECT | 100%
GUARANTEED TO PASS | GET A+
1. spinal nerves: 8 cervical
12 thoracic
5 lumbar
5 sacral
1 coccygeal
-breakfast at 8, lunch at 12, dinner at 5
2. all spinal nerves are mixed (sensory and motor) EXCEPT ...?: C1
3. dorsal rami innervates ...?: skin, joints, deep (intrinsic) muscles of back
4. ventral rami innervates ...?: skin, joints, and muscles of lateral and anterior
body walls + extremities (upper and lower limbs)
5. extrinsic muscles (beneath skin) in the superficial layer: ACT ON SCAPULA
-trapezius
,-latissimus dorsi -
rhomboids
-levator scapulae
6. extrinsic muscles (beneath skin) in the intermediate layer: ACT ON
THORACIC CAGE
-serratus posterior superior
-serratus posterior inferior
7. intrinsic muscles (true muscles) in the superficial layer: -erector spine
group -splenius muscles
8. intrinsic muscles (true muscles) in the intermediate layer: -
transversospinal muscles
9. intrinsic muscles (true muscles) in the deep layer: -interspinales muscles
-intertransversarii muscles
10. what are muscles of the superficial layer of the back and what do they act
on?: -upper limb muscles that have migrated to the back -act on pectoral
girdle
, 11. which muscles are part of the superficial layer of the back?: trapezius, LD,
rhomboids, levator scapulae
12. what is the innervation for superficial muscles of the back?: ventral rami
13. which muscles are intermediate?: serratus posterior superior serratus
posterior inferior
-act on ribs**
14. what is the innervation for intermediate back muscles?: ventral
rami 15. what are the deep muscles of the back?: erector spinae
group splenius group semispinalis group
16. what is the innervation for deep muscles of the back?: dorsal rami
17. cutaneous sensory of the back is innervated by ...?: dorsal rami
18. Extrinsic back muscles (superficial) attachment: appendicular skeleton
19. Extrinsic back muscles (superficial) innervation: ventral rami and
accessory nerve (trapezius)
20. scapulohumeral rhythm: motion of scapula and arm are coordinated
QUESTIONS AND ANSWERS 2026 LATEST UPDATED | 100% GRADED CORRECT | 100%
GUARANTEED TO PASS | GET A+
1. spinal nerves: 8 cervical
12 thoracic
5 lumbar
5 sacral
1 coccygeal
-breakfast at 8, lunch at 12, dinner at 5
2. all spinal nerves are mixed (sensory and motor) EXCEPT ...?: C1
3. dorsal rami innervates ...?: skin, joints, deep (intrinsic) muscles of back
4. ventral rami innervates ...?: skin, joints, and muscles of lateral and anterior
body walls + extremities (upper and lower limbs)
5. extrinsic muscles (beneath skin) in the superficial layer: ACT ON SCAPULA
-trapezius
,-latissimus dorsi -
rhomboids
-levator scapulae
6. extrinsic muscles (beneath skin) in the intermediate layer: ACT ON
THORACIC CAGE
-serratus posterior superior
-serratus posterior inferior
7. intrinsic muscles (true muscles) in the superficial layer: -erector spine
group -splenius muscles
8. intrinsic muscles (true muscles) in the intermediate layer: -
transversospinal muscles
9. intrinsic muscles (true muscles) in the deep layer: -interspinales muscles
-intertransversarii muscles
10. what are muscles of the superficial layer of the back and what do they act
on?: -upper limb muscles that have migrated to the back -act on pectoral
girdle
, 11. which muscles are part of the superficial layer of the back?: trapezius, LD,
rhomboids, levator scapulae
12. what is the innervation for superficial muscles of the back?: ventral rami
13. which muscles are intermediate?: serratus posterior superior serratus
posterior inferior
-act on ribs**
14. what is the innervation for intermediate back muscles?: ventral
rami 15. what are the deep muscles of the back?: erector spinae
group splenius group semispinalis group
16. what is the innervation for deep muscles of the back?: dorsal rami
17. cutaneous sensory of the back is innervated by ...?: dorsal rami
18. Extrinsic back muscles (superficial) attachment: appendicular skeleton
19. Extrinsic back muscles (superficial) innervation: ventral rami and
accessory nerve (trapezius)
20. scapulohumeral rhythm: motion of scapula and arm are coordinated
