Spine OIIA's Flashcards
Origin: Rectus capitis posterior major
Spinous process of C2
Insertion: Rectus capitis posterior major
Lateral portion of occipital below inferior nuchal line
Innervation: Rectus capitis posterior major
C1 spinal nerve
Action: Rectus capitis posterior major
Extension of head & rotation
Origin: Rectus capitis posterior minor
Posterior tubercle of C1
Insertion: Rectus capitis posterior minor
Medial portion of occipital below inferior nuchal line & dura mater
Innervation: Rectus capitis posterior minor
C1 spinal nerve
Action: Rectus capitis posterior minor
-Extension of head
-Pulls dura mater out of the way so that CSF can flow freely between spinal cord and brain
Origin: Obliquus capitis superior
Transverse process of C1
Insertion: Obliquus capitis superior
Occipital between superior & inferior nuchal line
Innervation: Obliquus capitis superior
C1 spinal nerve
Action: Obliquus capitis superior
Extends the head
Origin: Obliquus capitis inferior
Spinous processes of C2
Insertion: Obliquus capitis inferior
Transverse processes of C1
Innervation: Obliquus capitis inferior
C1 spinal nerve
Action: Obliquus capitis inferior
Rotation of head
Origin: Serratus posterior superior
Ligamentum nuchae
Insertion: Serratus posterior superior
Upper border of ribs 2-5
Innervation: Serratus posterior superior
Intercostal nerves (t1-T5)
Action: Serratus posterior superior
Elevates ribs 2-5 while inhaling
Origin: Serratus posterior inferior
Spinous processes of T11-L3 & supraspinous ligaments
Insertion: Serratus posterior inferior
Lower borders of ribs 9-12
Innervation: Serratus posterior inferior
Intercostal nerves (T9-T12)
Action: Serratus posterior inferior
Depresses ribs 9-12 while exhaling
