Exam 1 (back muscles - innervation)

Question 1

motor innervation: the spinal root accessary nerve (cranial XI - 11).
sensory innervation: C3-C4 nerves (pain and proprioception).

SN:
- most ____ muscles in the posterior region of the neck. Three parts: descending, transverse, and ___ fibers

Answer 1

trapezius

superficial; ascending fibers

Question 2

thoracodorsal nerve (C6, C7, C8) a branch of the posterior cord coming from the brachial plexus. ALSO INVOLVED IN COUGHING AND FORCED EXPIRATION (EXHALATION OF BREATH).

Answer 2

latissimus dorsi

Question 3

dorsal scapular nerve (C4-C5) to both ____ muscles.

- the ____ ____ is inferior to the ___ ____

Answer 3

rhomboid muscles

rhomboid major is inferior to the rhomboid minor

Question 4

dorsal scapular nerve (C4-C5)

Answer 4

levator scapulae

Question 5

Intercostal nerves (T1-T4)

Answer 5

serratus Posterior Superior (extrinsic back muscle)

Question 6

Intercostal nerves (T9-T12).

Answer 6

Serratus Posterior Inferior (extrinsic back muscles

Question 7

Primary dorsal rami (9 muscles)

Answer 7

Splenius Cervicis and Capitis, ILIOCOSTALIS , Spinalis, Longissimus, Semispinalis, Multifidus, Rotator (brevis and longus), (Interspinales, Intertransversarii, and levatores costarium),

Question 8

Sensory innervation of the region via the greater occipital nerve (C2)

Answer 8

Suboccipital Region and Triangle:

Rectus Capitis Posterior Major, Obliquus Capitis Superior, Obliquus Capitis Inferior