Muscles

Question 1

What does trapezius do to the neck both bilaterally and unilaterally?

Answer 1

B neck extension
Uni: ipsi SB, Contra ROT

Question 2

What does levator do to scapula?

Answer 2

elevate and downward rotate scapula

Question 3

what does levator do to neck?

Answer 3

ipsi SB and ROT

Question 4

what does levator resists?

Answer 4

lordotic position of the cervical spine

Question 5

What does splenius capitus and cervices do?

Answer 5

-large cross section and moment arm
B: Extension
Uni: ipsi rot

Question 6

What does semispinalis capitis and cervicis do?

Answer 6

extension and contra rotation of head, neck, thoracic spine

Question 7

what does semispinalis maintain?

Answer 7

lordosis

Question 8

What nerve pierce semispinalis capitis?

Answer 8

greater occipital nerve

Question 9

what does longissimus capitis and cervicis do?

Answer 9

B: frontal plane stabilizers
Uni:Ipsi SB
poor extensors due to short moment arm

Question 10

What does subocciptal muscles do? B/UNI

Answer 10

B: occipital ext
Uni: ipsi rot and SB of occiput on atlas

Question 11

what are the lateral muscles?

Answer 11

-scalenes (3)
-SCM

Question 12

what does scalenes do?

Answer 12

ant: B:flex, UNI: ipsi SB and ROT
middle: stablize in frontal plane; uni: SB
posterior: UNI: SB

Question 13

what does SCM do?

Answer 13

B: flex
UNI: ipsi SB, Contra rot

Question 14

what are the anterior muscles?

Answer 14

Longus capitis and longus coli and rectus capitis anterior and lateral

Question 15

what does the longus capitis and coli do?

Answer 15

-can flex but better at providing compression/proprioceptive input
-synergestically work to stabilize head with traps to allow distal contraction of traps on scapula

Question 16

what does the rectus capitis anterior and lateral do?

Answer 16

B:flex
greater at proprioceptive function

Question 17

What does the superficial and deep erector spinae do?

Answer 17

s: B:ext
uni: SB/rot

deep: create posterior compressive and shear forces, counteracting anterior shear forces

Question 18

multifidus? Tspine vs Lspine

Answer 18

T: contra rot and local segmental control
L: extension, synergerstic stabilizer with abs and local seg control

Question 19

Rotatories and inertransversarii

Answer 19

ipsi: SB
contra: Rot
primarily proprioception role

Question 20

quadratus lumborum

Answer 20

B: frontal plane stabilization
uni: ipsi SB

Question 21

rectus abdominius

Answer 21

B: flex trunk
uni: ipsi SB

Question 22

abdominal wall

Answer 22

muscle corset with thoracolumbar fascia; increases spinal stiffness

Question 23

transverse abdominus

Answer 23

core stabilization

Question 24

internal obliques

Answer 24

ipsi SB ipsi rot

Question 25

external oblique

Answer 25

ipsi SB contra rot

Question 26

psoas major

Answer 26

hip flexion with spinal stabilizaiton

Question 27

what can tightness in psoas major lead to?

Answer 27

anterior pelvic tilt which in turn increase compression and anterior shear