| musculus gemellus inferior | <anatomy, muscle> Origin, tuberosity of ischium; insertion, tendon of musculus obturator internus; action, rotates thigh laterally; nerve supply, sacral plexus. Synonym: musculus gemellus inferior, gemellus. (05 Mar 2000) |
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| musculus gemellus superior | <anatomy, muscle> Origin, ischial spine and margin of lesser sciatic notch; insertion, tendon of musculus obturator internus; action, rotates thigh laterally; nerve supply, sacral plexus. Synonym: musculus gemellus superior, gemellus. (05 Mar 2000) |
| gemellus | More specifically; inferior gemellus muscle, superior gemellus muscle. Origin: L. Dim. Of geminus, twin (05 Mar 2000) |
| superior gemellus | <anatomy, muscle> Origin, ischial spine and margin of lesser sciatic notch; insertion, tendon of musculus obturator internus; action, rotates thigh laterally; nerve supply, sacral plexus. Synonym: musculus gemellus superior, gemellus. (05 Mar 2000) |
| inferior gemellus | <anatomy, muscle> Origin, tuberosity of ischium; insertion, tendon of musculus obturator internus; action, rotates thigh laterally; nerve supply, sacral plexus. Synonym: musculus gemellus inferior, gemellus. (05 Mar 2000) |
| musculus spinalis | <anatomy> The medial component of the erector spinae muscle; it is comprised of the spinalis capitis, spinalis cervicis, and spinalis thoracis muscles. Synonym: musculus spinalis, spinal muscle. (05 Mar 2000) |
| musculus spinalis capitis | <anatomy> An inconstant extension of spinalis cervicis to the occipital bone, sometimes fusing with semispinalis capitis. Synonym: musculus spinalis capitis, biventer cervicis, spinal muscle of head. (05 Mar 2000) |
| musculus spinalis cervicis | <anatomy> An inconstant or rudimentary muscle; origin, spinous processes of sixth and seventh cervical vertebrae; insertion, spinous processes of axis and third cervical vertebra; action, extends cervical spine; nerve supply, dorsal primary rami of cervical. Synonym: musculus spinalis cervicis, musculus spinalis colli, spinal muscle of neck. (05 Mar 2000) |
| musculus spinalis colli | <anatomy> An inconstant or rudimentary muscle; origin, spinous processes of sixth and seventh cervical vertebrae; insertion, spinous processes of axis and third cervical vertebra; action, extends cervical spine; nerve supply, dorsal primary rami of cervical. Synonym: musculus spinalis cervicis, musculus spinalis colli, spinal muscle of neck. (05 Mar 2000) |
| musculus spinalis dorsi | <anatomy, muscle> Origin, spinous processes of upper lumbar and two lower thoracic vertebrae; insertion, spinous processes of middle and upper thoracic vertebrae; action, supports and extends vertebral column; nerve supply, dorsal primary rami of thoracic and upper lumbar. Synonym: musculus spinalis thoracis, musculus spinalis dorsi, spinal muscle of thorax. (05 Mar 2000) |
| musculus spinalis thoracis | <anatomy, muscle> Origin, spinous processes of upper lumbar and two lower thoracic vertebrae; insertion, spinous processes of middle and upper thoracic vertebrae; action, supports and extends vertebral column; nerve supply, dorsal primary rami of thoracic and upper lumbar. Synonym: musculus spinalis thoracis, musculus spinalis dorsi, spinal muscle of thorax. (05 Mar 2000) |
| arachnoidea mater spinalis | That portion of the arachnoid which lies within the vertebral canal and surrounds the spinal cord and the vertebral portion of the subarachnoid space. It extends from the foramen magnum above to the S-2 vertebral level. Since the spinal cord ends at the L-2 vertebral level, a wide separation occurs between the arachnoid and pia mater, the lumbar cistern, filled with cerebrospinal fluid in which the cauda equina is suspended. Synonym: arachnoidea mater spinalis, spinal part of arachnoid. (05 Mar 2000) |
| arteria spinalis anterior | <anatomy, artery> Origin, intracranial part of vertebral; distribution, spinal cord and pia mater; anastomoses, spinal of intercostal and lumbar arteries. Synonym: arteria spinalis anterior. (05 Mar 2000) |
| arteria spinalis posterior | <anatomy, artery> Origin, vertebral; distribution, medulla, spinal cord, and pia mater; anastomoses, spinal branches of intercostal arteries. Synonym: arteria spinalis posterior. (05 Mar 2000) |
| canalis centralis medullae spinalis | The ependyma-lined lumen (cavity) of the neural tube, the cerebral part of which remains patent to form the ventricles of the brain, while the spinal part in the adult often is reduced to a solid strand of modified ependyma. Synonym: canalis centralis medullae spinalis, central canal of spinal cord, tubus medullaris. Synonym: syringocele. (05 Mar 2000) |
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