Transversospinales Muscles Flashcards

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Questions and Answers

What is the origin of Semispinalis Thoracis and Cervicis?

Transverse processes of thoracic and cervical vertebrae (correct)

Sacrum, ilium and transverse processes of T1-T12

Transverse processes of C7-T11

C1-C7, L1-L5

What is the insertion point of Semispinalis Capitis?

Transverse processes of T1-T6

Spinous processes of vertebrae above

Costal table of the next lower rib

Medial half of the area between the superior and inferior nuchal lines on the occipital bone (correct)

List the Semispinalis muscles.

Thoracis, cervicis, capitis

What innervates the Semispinalis muscles?

Dorsal rami of inferior cervical and thoracic nerves Signup and view all the answers

Which of the following are muscles of the Transversospinalis?

All of the above Signup and view all the answers

From where does Multifidus originate?

Sacrum, ilium and transverse processes of T1-T12 Signup and view all the answers

What is the insertion point for Multifidus?

Spinous processes of vertebrae above, spanning 2-4 vertebrae Signup and view all the answers

The origin of Rotatores is the ______.

Transverse processes Signup and view all the answers

Describe the insertion of Rotatores.

Between lamina and transverse processes of vertebrae above, spanning one or two. Signup and view all the answers

What is the function of Rotatores?

Rotate the superior vertebrae to the opposite side Signup and view all the answers

What are the functions of Multifidus?

Unilaterally, flexes trunk laterally and rotates it to the opposite side; bilaterally, extends the trunk and stabilizes the vertebral column. Signup and view all the answers

Where do Interspinalis and Intertransversarii originate?

C1-C7, L1-L5 Signup and view all the answers

What is the insertion of Interspinalis and Intertransversarii?

Spinous process of adjacent vertebrae Signup and view all the answers

What is the function of Interspinalis and Intertransversarii?

Extend cervical and lumbar spine Signup and view all the answers

Where does Levator Costarum originate?

Transverse processes of C7-T11 Signup and view all the answers

What is the insertion point of Levator Costarum?

Costal table of next lower rib (brevis) or rib 2 vertebrae below (longus) Signup and view all the answers

Study Notes

Transversospinales Muscles Overview

Comprises muscles that connect vertebrae in the spine, essential for rotation and stabilization.
Includes the Semispinalis, Multifidus, Rotatores, Interspinales, Intertransversarii, and Levator costarum.

Semispinalis Muscles

Origin: Transverse processes of thoracic and cervical vertebrae.
Subtypes:
- Semispinalis thoracis and cervicis: Insertion to spinous processes of adjacent vertebrae.
- Semispinalis capitis: Originates from transverse processes of T1-T6; inserts superiorly to the medial half between the superior and inferior nuchal lines on the occipital bone.

Multifidus

Origin: Sacrum, ilium, transverse processes of T1-T12, and articular processes of C4-C7.
Insertion: Spinous processes of vertebrae above, spanning 2-4 vertebrae.
Function:
- Unilateral: Flexes trunk laterally and rotates opposite side.
- Bilateral: Extends the trunk and stabilizes vertebral column.

Rotatores

Origin: Transverse processes of vertebrae.
Insertion: Positioned between lamina and transverse processes of the vertebrae above (spanning one for rotatores brevis and two for rotatores longus).
Function: Rotates superior vertebrae to the opposite side.

Interspinalis and Intertransversarii

Origin: C1-C7 and L1-L5.
Insertion: Spinous processes of adjacent vertebrae.
Function: Extends cervical and lumbar spine.

Levator Costarum

Origin: Transverse processes of C7-T11.
Insertion: Costal angle of the next lower rib (brevis) or rib 2 vertebrae below (longus).

Innervation

The semispinalis muscles are innervated by the dorsal rami of inferior cervical and thoracic nerves, facilitating motor control.

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Description

This quiz provides flashcards on the transversospinales muscles of the back, focusing on their origins, insertions, and definitions. Perfect for students in anatomy or related fields to reinforce their knowledge of muscle anatomy.