5/24 suboccipital muscles

Question 1

obliquus capitis inferior

Answer 1

O
-SP C2

IS
-C1

I
-C1 pr= suboccipital nerve

A

• bilaterally extends head
• unilaterally, rotates head to same side

Question 2

obliquus capitis superior

Answer 2

O
-TP C1

IS

• btw sup and inferior nuchal line
• above rcpm

I
-C1

A

• bilaterally extend head
• unilaterally tilts head to same side, rotates opposite side

Question 3

rectus capitis posterior major

Answer 3

O
-SP C2

IS
-lateral half of inferior nuchal line

I
-suboccipital nerve

Action

• bilaterally extend head
• unilaterally rotate head to same side

Question 4

rectus capitis posterioor minor

Answer 4

O
-TP C2

IS
- medial third of infeior nuchal line

I
-suboccipital nerve

A
- same as rectus capitis posterior major