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ANAT UNIT 1 FINAL

DEEP BACK AND SUBOCCIPITAL REGION

QuestionAnswer
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
Created by: AnatomyByDocRoxy