Week 2 Muscle Quiz

Question 1

Scalenes (3 parts)

Answer 1

(Anterior, Middle, Posterior)

O. Transverse process of cervical vertebrae
(Ant = C3-6) (Mid = C2-7) (Post = C4-6)
I. Ribs
(Ant = 1st) (Mid = 1st) (Post = 1st & 2nd)
A. Ant = Flexion of head
Mid = Lateral flexion of neck & elevation of 1st rib in forced inspiration
Post = Lateral flexion of neck & elevation of 2nd rib in forced inspiration
N. C3-8 spinal ns

Question 2

Splenius Capitis

Answer 2

O. Ligamentum nuchae (C7, T1-3 vertebrae - spinous process)
I. Mastoid process of temporal bone & Superior nuchal line of occipital bone
A. Bilaterally = extension of head & neck
Unilaterally = lateral flexion of head & neck, rotation of head & neck to same side
N. C1-C6 spinal ns

Question 3

Splenius Cervicis

Answer 3

O. T3-6 vertebrae
I. C1,2,3 vertebrae - transverse processes
A. Bilaterally = extension of head & neck
Unilaterally = lateral flexion of head & neck, rotation of head & neck to same side
N. C1-C6 spinal ns

Question 4

Multifidus (4 parts)

Answer 4

(Cervical, Thoracic, Lumbar, Sacral)

O. C4-C7 vertebrae - articular processes
T1-T3 vertebrae - transverse processes
Lumbar vertebrae, posterior sacrum, posterior superior iliac spine of ilium, sacroiliac ligaments & thoracolumbar aponeurosis
I. All vertebrae - spinous process
A. Stabilization of vertebral column 
N. Spinal ns

Question 5

Rectus Abdominis

Answer 5

O. Pubic symphysis & Pubic crest
I. Ribs 5,6,7 - coastal cartilages & Xiphoid process
A. Flexion of trunk & Compression and support of abdominal viscera
N. Thoracoabdominal ns

Question 6

External Abdominal Oblique

Answer 6

O. Ribs 5-12
I. Linea alba, Pubis & Anterior iliac crest
A. Bilaterally = Flexion of trunk & Compression mad support of abdominal viscera
Unilaterally = Lateral flexion of trunk & Rotation of trunk to opposite side
N. Thoracoabdominal ns, Subcostal n

Question 7

Internal Abdominal Oblique

Answer 7

O. Inguinal ligament, Anterior iliac crest & Thoracolumbar aponeurosis
I. Lower 4 ribs (9-12) - coastal cartilages, Abdominal aponeurosis & Linea alba
A. Bilaterally = Flexion of trunk & Compression and support of abdominal viscera
Unilaterally = Lateral flexion of trunk & Rotation of trunk to same side
N. Thoracoabdominal ns

Question 8

Transverse Abdominis

Answer 8

O. Inguinal ligament, Iliac crest, Thoracolumbar aponeurosis & Ribs 7-12
I. Abdominal aponeurosis, Linea alba & Pubis
A. Compression and support of abdominal viscera
N. Thoracoabdominal ns

Question 9

Erector Spinae (3 parts)

Answer 9

(Iliocostalis, Longissimus, Spinalis)

O. Thoracolumbar fascia, Illiac crest of ilium, Sacrum, Sacral ligaments & Lumbar vertebrae
I. Iliocostalis = Lower ribs & Cervical vertebrae
Longissimus = Ribs 3-12, Thoracic vert, Cervical vert & Mastoid process of temporal bone
Spinalis = Thoracic vert, Cervical vert & Occipital bone
A. Bilaterally = Extension of spine
Unilaterally = Lateral flexion of spine to same side
N. Spinal ns

Question 10

Quadratus Lumborum

Answer 10

O. Iliac crest of ilium
I. 12th rib & Lumbar vertebrae 1-4
A. Stabilization of 12th rib in inspiration
Unilaterally = Lateral flexion of trunk to same side & Elevation of pelvis to same side if thorax and vertebrae column are fixed
N. T12, L1-L4 spinal ns

Question 11

Sternocleidomastoid

Answer 11

O. Manubrium of sternum & Medial clavicle
I. Mastoid process of temporal bone
A. Bilaterally= Extension of head & Flexion of neck
Unilaterally= Lateral flexion of head/neck to same side & Rotation of head/neck to opposite side
N. Spinal Accessory Nerve (CN XI)