12.3 Suboccipital Triangle Flashcards
Describe the boundaries of the Suboccipital triangle.
What passes through this space?
Rectus capitis posterior major
Obliquus capitis superior
Obliquus capités inferior
-vertebral artery and suboccipital n. (C1)
Identify the obliquus capitis inferior muscle, its attachments, function, and innervation.
- Attachments: spinous process of C2 to transverse process of C1
- Function: extension of head on C1 and rotation of head on C1 and C2
- Innervation: posterior ramus of C1 spinal nerve
Identify the obliquus captious superior muscle, its attachments, function, and innervation.
- Attachments: transversec process of C1 to occiput
- Function: extension of head on C1 and rotation of head on C1 and C2
- Innervation: posterior ramus of C1 spinal nerve
Identify the rectus capitis posterior major muscle, its attachments, function, and innervation.
- Attachments: spinous process of C2 to lateral inferior nuchal line
- Function: extension of head on C1 and rotation of head on C1 and C2
- Innervation: posterior ramus of C1 spinal nerve
Identify the rectus capitis posterior minor muscle, its attachments, function, and innervation.
- Attachments: posterior tubercle of C1’s posterior arch to medial 1/3rd of inferior nuchal line
- Function: extension of head on C1 and rotation of head on C1 and C2
- Innervation: posterior ramus of C1 spinal nerve
Identify the greater occipital nerve, its root, course, and general function.
- Typically passes through the semi spinalis capitis muscle.
- Posterior ramus of C2
- Cutaneous to skin over neck and occiput
Identify the sub occipital nerve, its root, and general function.
- Posterior ramus of C1
- Motor to muscles of suboccipital triangle
Identify the vertebral artery and describe its root and course and general function.
- Branch from subclavian aa.
- Pass through transverse foramen of cervical vertebrae, turns medially to enter cranium via foramen magnum.
- Supplies posterior region of brain.
