Unit 1: Lecture 8

Question 1

Purpose of deep back muscles is to…

Answer 1

extend, rotate, and stabilize vertebrae

Question 2

Innervation of deep back and neck muscles is accomplished segmentally by branches of…

Answer 2

DORSAL primary rami of spinal nerves

Question 3

Intermediate layer of back muscles

Answer 3

• Errector spinae
• Serratus posterior Superior
• Serratus posterior Inferior

Question 4

Deep layer of back muscles

Answer 4

Transversospinalis group

Question 5

Errector spinae/sacrospinalis group/paravertebral group

Answer 5

• Iliocostalis group
• Longissimus group
• Spinalis group

Question 6

Iliocostalis segments

Answer 6

Cervicis
Thoracis
Lumborum

Question 7

Longissimus segments

Answer 7

Capitis
Cervicis
Thoracis

Question 8

Spinalis segments

Answer 8

Capitis
Cervicis
Thoracis

Question 9

Transversospinalis group

Answer 9

(originate from transverse processes)

• Rotatores group (1-2 seg)
• Multifidus group (2-4 seg)
• Semispinalis group (4-6 seg)

Question 10

Rotatores group segments

Answer 10

Lumborum
Thoracis
Cervicis

Question 11

Multifidus group segments

Answer 11

Lumborum
Thoracis
Cervicis

Question 12

Semispinalis group segments

Answer 12

Thoracis
Cervicis
Capitis

Question 13

Minor deep back muscles (3)

Answer 13

• Intertransversarri (lumbar and cervical groups)
• Interspinales (lumbar and cervical groups)
• Levatores costarum, longus & brevis (thoracic)

Question 14

Which deep back muscles extend into the posterior neck? (5)

Answer 14

• Semispinalis capitis & cervicis
• Longissimus capitis & cervicis
• Splenius cervicis