Show pageOld revisionsBacklinksBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ====== VERTEBRAL ARTERY ====== * Vertebral artery * First part * Origin of artery to transverse process of 6 th cervical vertebra * Course * Runs upwards * Scalenovertebral triangle * Present at root of neck * Boundaries * Lateral Scalenus anterior * Medial : oblique part of longus colli muscle * Apex : transverse process of cervical vertebra * Base : first part of subclavian artery * Posterior wall : transverse process of C7 , ventral ramus of C8 nerve , neck of first rib * Relations * Anterior * Carotid sheath with common carotid artery * Vertebral vein * Inferior thyroid artery * Thoracic duct on left side * Posterior * Transverse process of 7 th cervical vertebra * Stellate ganglion * Ventral Rami of nerves C7 , C8 * Second part * Runs through foramina transversria of upper 6 cervical vertebra * Finally reaches foramen of atlas * Relations * accompanied by venous plexus and a large branch from stellate ganglion * Ventral Rami of second to 6 th cervical nerves * Third part * Lies in suboccipital triangle * Emerges from atlas * Winds medially around posterior aspect of arch of atlas * Relations * Medial : ventral ramus of first cervical nerve * Lateral : rectus capitis Lateralis * Posterior : semispinalis capitis * Anterior : lateral mass of atlas * Fourth part * Atlantooccipital membrane to pons * Vertebral canal it pierces duramater * At lower border of pons it joins to form basilar artery * Branches * Cervical branches * Arise from 4 th part * Anterior spinal artery * Posterior spinal artery * Posterior inferior cerebellar artery * Meningeal branches en/vertebral_artery.txt Last modified: 2023/06/19 09:53by 127.0.0.1