| semispinalis thoracis | <anatomy, muscle> Origin, transverse processes of fifth to eleventh thoracic vertebrae; insertion, spinous processes of first four thoracic and fifth and seventh cervical vertebrae; action, extends vertebral column; nerve supply, dorsal primary rami of cervical and thoracic spinal nerves. Synonym: musculus semispinalis thoracis, musculus semispinalis dorsi, semispinal muscle of thorax. (05 Mar 2000) |
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| musculus semispinalis thoracis | <anatomy, muscle> Origin, transverse processes of fifth to eleventh thoracic vertebrae; insertion, spinous processes of first four thoracic and fifth and seventh cervical vertebrae; action, extends vertebral column; nerve supply, dorsal primary rami of cervical and thoracic spinal nerves. Synonym: musculus semispinalis thoracis, musculus semispinalis dorsi, semispinal muscle of thorax. (05 Mar 2000) |
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| musculus semispinalis | <anatomy> The most superficial layer of the three layers of the transversospinal muscle; comprised of semispinalis capitis, semispinalis cervicis, and semispinalis thoracis muscles. Synonym: musculus semispinalis, semispinal muscle. (05 Mar 2000) |
| musculus semispinalis capitis | <anatomy, muscle> Origin, transverse processes of five or six upper thoracic and articular processes of four lower cervical vertebrae; insertion, occipital bone between superior and inferior nuchal lines; action, rotates head and draws it backward; nerve supply, dorsal primary rami of cervical spinal nerves. Synonym: musculus semispinalis capitis, musculus complexus, semispinal muscle of head. (05 Mar 2000) |
| musculus semispinalis cervicis | <anatomy> Continuous with musculus semispinalis thoracis; origin, transverse processes of second to fifth thoracic vertebrae; insertion, spinous processes of axis and third to fifth cervical vertebrae; action, extends cervical spine; nerve supply, dorsal primary rami of cervical and thoracic spinal nerves. Synonym: musculus semispinalis cervicis, musculus semispinalis colli, semispinal muscle of neck. (05 Mar 2000) |
| musculus semispinalis colli | <anatomy> Continuous with musculus semispinalis thoracis; origin, transverse processes of second to fifth thoracic vertebrae; insertion, spinous processes of axis and third to fifth cervical vertebrae; action, extends cervical spine; nerve supply, dorsal primary rami of cervical and thoracic spinal nerves. Synonym: musculus semispinalis cervicis, musculus semispinalis colli, semispinal muscle of neck. (05 Mar 2000) |
| musculus semispinalis dorsi | <anatomy, muscle> Origin, transverse processes of fifth to eleventh thoracic vertebrae; insertion, spinous processes of first four thoracic and fifth and seventh cervical vertebrae; action, extends vertebral column; nerve supply, dorsal primary rami of cervical and thoracic spinal nerves. Synonym: musculus semispinalis thoracis, musculus semispinalis dorsi, semispinal muscle of thorax. (05 Mar 2000) |
| semispinalis capitis | <anatomy, muscle> Origin, transverse processes of five or six upper thoracic and articular processes of four lower cervical vertebrae; insertion, occipital bone between superior and inferior nuchal lines; action, rotates head and draws it backward; nerve supply, dorsal primary rami of cervical spinal nerves. Synonym: musculus semispinalis capitis, musculus complexus, semispinal muscle of head. (05 Mar 2000) |
| semispinalis cervicis muscle | <anatomy> Continuous with musculus semispinalis thoracis; origin, transverse processes of second to fifth thoracic vertebrae; insertion, spinous processes of axis and third to fifth cervical vertebrae; action, extends cervical spine; nerve supply, dorsal primary rami of cervical and thoracic spinal nerves. Synonym: musculus semispinalis cervicis, musculus semispinalis colli, semispinal muscle of neck. (05 Mar 2000) |
| semispinalis muscle | <anatomy> The most superficial layer of the three layers of the transversospinal muscle; comprised of semispinalis capitis, semispinalis cervicis, and semispinalis thoracis muscles. Synonym: musculus semispinalis, semispinal muscle. (05 Mar 2000) |
| apertura thoracis inferior | The inferior boundary of the bony thorax composed of the twelfth thoracic vertebra and the lower margins of the rib cage and sternum. Synonym: apertura thoracis inferior. (05 Mar 2000) |
| apertura thoracis superior | The upper boundary of the bony thorax composed of the first thoracic vertebra and the upper margins of the first ribs and manubrium of the sternum. Synonym: apertura thoracis superior. (05 Mar 2000) |
| cavitas thoracis | The space within the thoracic walls, bounded below by the diaphragm and above by the neck. Synonym: cavitas thoracis, cavum thoracis. (05 Mar 2000) |
| cavum thoracis | The space within the thoracic walls, bounded below by the diaphragm and above by the neck. Synonym: cavitas thoracis, cavum thoracis. (05 Mar 2000) |
| rotatores thoracis muscles | The rotators of the thoracic vertebrae. Synonym: musculi rotatores thoracis, thoracic rotator muscles. (05 Mar 2000) |
| compages thoracis | The skeleton of the thorax consisting of the thoracic vertebrae, ribs, costal cartilages, and sternum. Synonym: compages thoracis, skeleton thoracicus. (05 Mar 2000) |
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