Spinal Muscles: Global vs. Deep Segmental

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Questions and Answers

Which characteristic describes global spinal muscles?

Attach to each vertebral segment
Located deep, closer to the axis of motion
Primarily composed of Type 1 muscle fibers
Cross multiple vertebral segments (correct)

Deep segmental muscles have a greater percentage of which type of muscle fibers?

Fast twitch
Type IIa
Type 1 (correct)
Type IIb

Which of the following muscles is considered a global muscle in the lumbar region?

Rectus abdominis (correct)
Transversus abdominis
Deep QL
Multifidus

Which of the following muscles is considered a deep muscle in the lumbar region?

<p>Transversus abdominis (C)</p> Signup and view all the answers

Which of the following muscles is considered a deep muscle in the cervical region?

<p>Longus colli (B)</p> Signup and view all the answers

Flashcards

Global Spinal Muscles

Superficial muscles that cross multiple vertebral segments, producing large spinal movements and power.

Deep Segmental Spinal Muscles

Deep muscles that attach to each vertebral segment, stabilizing individual vertebrae, and have a high percentage of Type 1 muscle fibers.

Global Lumbar Muscles

Rectus abdominis, obliques, quadratus lumborum (QL), erector spinae, and iliopsoas.

Global Cervical Muscles

Sternocleidomastoid (SCM), scalenes, levator scapulae, upper trapezius, and erector spinae.

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Deep Lumbar Muscles

Transversus abdominis, multifidus, deep quadratus lumborum, and deep rotators.

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Study Notes

Characteristics of superficial/global spinal muscle and deep/segmental spinal muscles should be known (cervical and lumbar)

Global Muscles

Superficial (further from the axis)
Crosses multiple vertebral segments
Produces larger movements and power through the spine

Deep Segmental Muscles

Deep (closer to the axis of motion)
Attach to each vertebral segment
Play a key role in stabilizing individual vertebrae and segments of the spine
Consists of a greater percentage of Type 1 muscle fibers
Muscles that comprise the deep/segmental core muscles should be known (cervical and lumbar)

Global Muscles

Lumbar region: Rectus abdominis, Obliques, QL, erector spinae and ilio psoas
Cervical region: SCM, scalene, levator scapulae, Upper traps, and erector spinae
Contract 2nd

Deep Muscles

Lumbar region: Transversus abdominis, multifidus, deep QL and deep rotators
Cervical region: Rectus capitis anterior and lateralis and longus colli
Contract first

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Description

An overview of spinal muscles. The lesson covers the characteristics of superficial/global spinal muscles and deep/segmental spinal muscles in both the cervical and lumbar regions. Focus is given to the role of each muscle group.