Muscles/Origin/Insertion/NN

Question 1

What are the four suboccipital muscles?

Answer 1

Rectus capitis posterior major, Rectus capitis posterior minor, Obliquus capitis superior, Obliquus capitis inferior

Question 2

What is the origin of the Rectus capitis posterior major?

Answer 2

Spinous process of the axis (C2)

Question 3

Where does the Rectus capitis posterior minor insert?

Answer 3

Medial part of the inferior nuchal line of the occipital bone

Question 4

True or False: The Obliquus capitis inferior originates from the transverse process of the atlas.

Answer 4

False

Question 5

What is the primary action of the suboccipital muscles?

Answer 5

Extension and rotation of the head

Question 6

Which muscle is innervated by the suboccipital nerve?

Answer 6

All four suboccipital muscles

Question 7

Fill in the blank: The Obliquus capitis superior originates from the __________.

Answer 7

Transverse process of the atlas (C1)

Question 8

What region of the body do the suboccipital muscles belong to?

Answer 8

Cervical region

Question 9

What is the insertion point of the Obliquus capitis superior?

Answer 9

Between the superior and inferior nuchal lines of the occipital bone

Question 10

Which suboccipital muscle is responsible for rotating the head to the same side?

Answer 10

Obliquus capitis inferior

Question 11

What is the innervation source for the suboccipital nerve?

Answer 11

Dorsal ramus of the first cervical nerve (C1)

Question 12

True or False: The Rectus capitis posterior minor contributes to head rotation.

Answer 12

False

Question 13

What action does the Rectus capitis posterior major perform?

Answer 13

Extension and rotation of the head to the same side

Question 14

Fill in the blank: The suboccipital muscles are located __________ to the suboccipital triangle.

Answer 14

Deep

Question 15

Which muscle assists in extending the head and neck?

Answer 15

Rectus capitis posterior major

Question 16

What is the relationship between the Obliquus capitis superior and the Obliquus capitis inferior?

Answer 16

The Obliquus capitis superior is located above the Obliquus capitis inferior

Question 17

What is the primary blood supply to the suboccipital muscles?

Answer 17

Vertebral artery and occipital artery

Question 18

True or False: The Rectus capitis posterior minor has a larger role in rotation than the Rectus capitis posterior major.

Answer 18

False

Question 19

Fill in the blank: The suboccipital muscles are primarily involved in __________ and __________ movements.

Answer 19

Extension, rotation

Question 20

What is the clinical significance of the suboccipital muscles?

Answer 20

They can be involved in tension headaches and neck pain.

Question 21

Which muscle is the most medial of the suboccipital muscles?

Answer 21

Rectus capitis posterior minor

Question 22

What is the action of the Obliquus capitis superior?

Answer 22

Extends and laterally flexes the head

Question 23

Where does the Obliquus capitis inferior insert?

Answer 23

Transverse process of the atlas (C1)

Question 24

What is the primary function of the suboccipital triangle?

Answer 24

To provide a passage for the vertebral artery and suboccipital nerve

Question 25

True or False: The suboccipital muscles are responsible for flexing the head.

Answer 25

False

Question 26

Name the infrahyoid muscles that are innervated by ansa cervicalis (C1-C3) | OhShS

Answer 26

* Omo-hyoid *Sternohyoid *Sternothyroid

Question 27

What is the name of the infrahyoid muscle that is NOT innervated my ansa cervicalis? What is it innervated by?

Answer 27

Thyro-hyoid Ventral ramus if C1 (via hypoglossal nerve)

Question 28

What is the origin and insertion of the Omo-hyoid muscle? | from the infrahyoid muscle group ## Footnote is depresses and draws the hyoid posteriorly, double bellied

Answer 28

Origin: Inferior - Superior scapula border Superior - intermediate tendon Insertion: Inferior - intermediate tendon connected to carotid sheath Superior - hyoid body

Question 29

What is the origin and insertion of the Sterno-hyoid muscle? | from the infrahyoid muscle group ## Footnote is depresses hyoid, most superficial of the group

Answer 29

Origin: *posterior manubrium of sternum *posterior medial end of clavicle Insertion: *inferior border of Hyoid body

Question 30

What is the origin and insertion of the Sterno-Thyroid muscle? | from the infrahyoid muscle group ## Footnote is depresses Larynx, only muscle of the group not connected to hyoid

Answer 30

Origin: *posterior manubrium of sternum *costal cartilage of Rib 1 Insertion: *Oblique line of thyroid cartilage

Question 31

What is the origin and insertion of the Thyro-hyoid muscle? | from the infrahyoid muscle group ## Footnote is depresses hyoid and elevate Larynx, only one in the group NOT innervated my ansa cervicalis

Answer 31

Origin: *Oblique line of thyroid cartilage Insertion: *body and greater cornu of hyoid

Question 32

What is the origin, insertion, innervation, and action of the Sterno-cleido-mastoid muscle? ## Footnote superficial, suboccipital

Answer 32

Origin: *Superior anterior surface of sternum manubrium *superior medial third of clavicle Insertion: *Lateral surface of Mastoid process of temporal bone *Lateral half of nuchal of occipital bone Innervation: Accessory CN XI branches of cervical plexus (C2-C3) Unilateral contraction Bilateral contraction