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ANAT UNIT 1 FINAL
DEEP BACK AND SUBOCCIPITAL REGION
| Question | Answer |
|---|---|
| These four mucsles (2 bilateral for a total of 4) comprise the spinotransversales muscle group: | SPLENIUS CAPITIS AND SPLENIUS CERVICIS |
| This muscle arises from the inferior half of the ligamentum nuchae and the spinous processes of the C7-T4 vertebrae and inserts into the mastoid process of the temporal bone. It lies deep to trapezius in the neck. | SPLENIUS CAPITIS |
| The unilateral action of splenius capitis is: | IPSILATERAL BENDING AND ROTATION OF THE FACE |
| Bilateral contraction of the splenius capitis muscles results in: | EXTENSION OF THE NECK |
| This muscle arises from the spinous processes of T3-T6 vertebrae and inserts into the posterior tubercles of the transverse processes of the C1-C3. It lies inferior and anterior to splenius capitis. | SPLENIUS CERVICIS |
| The most lateral of the erector spinae muscles initiating from the lumbar region and ending in the cervical region are: | ILIOCOSTALIS: LUMBORUM, THORACIS, CERVICIS |
| The two middle erector spinae muscles from thorax to skull are: | LONGISSIMUS: THORACIS, CERVICIS, CAPITIS |
| The most medial and least substantial of the erector spinae muscles are: | SPINALIS: THORACIS, CERVICIS, CAPITIS |
| The transversospinalis muscles consist of these three muscle groups: | SEMISPINALIS: (THORACIS, CERVICIS, CAPITIS), MULTIFIDI, ROTATORES |
| Unilateral contraction of multifidus results in: | LATERAL FLEXION OF THE VERTEBRAL COLUMN AND CONTRALATERAL ROTATION |
| Bilateral contraction of multifidus results in: | EXTENSION OF THE VERTEBRAL COLUMN |
| These muscles are the deepest of the transversospinalis group and are most likely important in stabilizing the vertebrae and in proprioception. | ROTATORES |
| These minor deep muscles are involved in posture: | INTERSPINALES AND INTERTRANSVERSARII |
| These minor deep muscles run in the same oblique direction as the rotatores but lie lateral to them. They are involved in inspiration. | LEVATORES COSTARUM |
| Nearly all intrinsic back muscles are innervated by: | THE DORSAL RAMI OF SPINAL NERVES |
| The only intrinsic back muscles innervated by ventral rami are the: | INTERTRANSVERSARII |
| What four muscles comprise the suboccipital region? | RECTUS CAPITIS POSTERIOR MAJOR, RECTUS CAPITIS POSTERIOR MINOR, OBLIQUUS CAPITIS INFERIOR, OBLIQUUS CAPITIS SUPERIOR |
| This space is formed by obliquus capitis inferior on the bottom, obliquus capitis superior on the lateral, and rectus capitis major on the medial borders. | SUBOCCIPITAL TRIANGLE |
| This nerve is the dorsal ramus of the C1 spinal nerve and runs through the suboccipital triangle and innervates all four suboccipital muscles: | SUBOCCIPITAL NERVE |
| This artery is the first branch off of the subclavian. It ascends from the C6 to C1 vertebrae and runs thorugh the suboccipital triangle. | VERTEBRAL ARTERY |
| This nerve is the dorsal ramus of C2 spinal nerve and runs inferior to the subocciptal triangle. | GREATER OCCIPITAL NERVE |
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AnatomyByDocRoxy
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