Spinal Anatomy Myology (15%)

Question 1

Look over the muscles on page 8, 9, and 10 of note packet

Answer 1

be sure to pay attention to innervation/action/and blood supply

Question 2

Does the tempomandibular joint have a disc?

Answer 2

Yes

Question 3

Which muscles are important in thoracic outlet syndrome where brachial plexus gets trapped?

Answer 3

1. scalenus anterior
2. Scalenus medius
3. scalenus posterior

Question 4

What are the contents of the suboccipital triangle?

Answer 4

Suboccipital nerve & VERTEBRAL artery

Question 5

What muscles make up the borders of the suboccipital triangle?

Answer 5

1. Superior oblique
2. RCPM
3. Inferior oblique

Question 6

What makes up the floor of the suboccipital triangle?

Answer 6

posterior atlanto-occipital membrane

Question 7

What makes up the roof of the suboccipital triangle?

Answer 7

semispinalis capitis muscle

Question 8

Which artery transverses through the suboccipital triangle?

Answer 8

vertebral artery

Question 9

Which nerve transverses through the suboccipital triangle?

Answer 9

Suboccipital nerve

Question 10

Name the superior, lateral border of the suboccipital triangle?

Answer 10

Superior oblique

Question 11

Name the medial border of the suboccipital triangle?

Answer 11

RCP major

Question 12

Name the inferior, lateral border of the suboccipital triangle?

Answer 12

inferior oblique

Question 13

What are the deep back muscles innervated by?

(multifidus, rotatores, intertransversarii, interspinalis, iliocostalis, longissimus, spinalis)

Answer 13

All = Spinal N. dorsal rami

Intertransverarii = Spinal N. dorsal & ventral rami

Question 14

what are the erector spinae muscles?

Answer 14

Iliocostatlis

Longissimus

Spinalis

Question 15

How can you remember the erector spinae muscle group?

Answer 15

I Love Spinal (Lateral to medial)

Question 16

What is the action of the erector spinae muscle group?

Answer 16

Extends & ipsilateral flexion

Question 17

What mucle elevates the ribs?

Answer 17

External intercostals & subcostalis

Question 18

What muscles depress the ribs?

Answer 18

Internal intercostals & Transverse thoracic

Question 19

What is the innervation of the muscles of the thorax?

Answer 19

Intercostal N.

Question 20

What is the muscle that retracts the testis?

Answer 20

Cremasteric

Question 21

What is the innervation of the cremaster muscle?

Answer 21

Genitofemoral

Question 22

What muscle is pierced by the Femoral nerve?

Answer 22

Psoas major

Question 23

What muscle of the posterior abdominal wall is sometimes abscent in individuals?

Answer 23

psoas minor

Question 24

What muscle is pierced by the sciatic Nerve?

Answer 24

Piriformis

Question 25

What is the yes no muscle?

Answer 25

Ischiocavernosis

Question 26

Why is the ischiocavernosus muscle considered the yes no muscle?

Answer 26

it aids in erection for males (YES)

&

constricts vaginal orifice in females (NO)