Deep Back Muscles (quizlet)

Question 1

What is the purpose of intervertebral discs?

Answer 1

Flexility allows for the movement of vertebral spine, not just a shock absorber

Question 2

Explain healthy curvature of spine (Sagittal plane)

Answer 2

Anteriorly concave kyphosis: found in thorax and sacrum

Anteriorly convex lordosis: natural curvature of neck (cervical) and lower back (lumbar)

Question 3

Name the muscle of the transversospinalis group

Answer 3

• rotator brevis/longus: TP-SP (1-2 segments)
• multifidis brevis/longus: TP-SP (3-4 segments, mainly in lumbar region)

-semispinalis: same but 5-8 segments. When you first uncover back, you mainly see the long slips of this muscle. Don’t extend to lumbar region
Superiorly-capitus: more superior & superficial
-cervicis

Question 4

Name the name and location of the erector spinae muscles

Answer 4

Most lateral: iliocostales

Middle: longissimus

Most medial: spinalis

Question 5

What deep muscle connects the TP of one vertebrae to the ribs?

Answer 5

Levatores costarum: brevis and longus “complex” 1-2 segments

*weak rib lifters?

Question 6

What are the two single segment adjacent muscles?

Answer 6

Interspinalis: SP-SP

Intertransversarii: TP-TP

Question 7

Name the deep back muscles

Answer 7

Erector spinae: iliocostales, longissimus, spinalis

Spinotransverse: splenius capitis/ cervicis

Transversospinalis: semispinalis, multifidus, rotators

Transversocostal: levatores costarum

Segmental: interspinalis, intertransverse

Suboccipital (4) ?? Part of deep back?