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Arteries in the cranial cavity

Arteries in the cranial cavity. Arteries . Internal carotid artery Middle meningeal artery Vertebral artery. Internal carotid artery. Terminal branch of common carotid artery Given off at the level of upper border of thyroid cartilage Its course is divided into four parts. parts.

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Arteries in the cranial cavity

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  1. Arteries in the cranial cavity

  2. Arteries • Internal carotid artery • Middle meningeal artery • Vertebral artery

  3. Internal carotid artery • Terminal branch of common carotid artery • Given off at the level of upper border of thyroid cartilage • Its course is divided into four parts

  4. parts • Cervical part: in the neck within carotid sheath .no branches • Petrous part:within petrous part of temporal bone,in the carotid canal • Cavernous part :within the cavernous sinus gives branches to • A)trigeminal ganglion • B) superior and inferior hypophyseal branches • Cerebral part :after emerging out of cavernous sinus • Branches a)ophthalmic • B) Anterior cerebral • C)middle cerebral • D )Posterior communicating • E) Anterior choroidal.

  5. Ophthalmic artery • Branch of internal carotid artery • Given off at anterior clinoid process • Enters the orbit through optic canal • BRANCHES • 1)while in dural sheath it gives of central artery of retina. • 2)at exit from dural sheath Lacrimal branch • 3)main trunk

  6. Central artery of retina • An end artery i.edoesnot anastomose with any other artery • Enters the optic disc to supply the retina. • Occlusion leads to blindness • Can be visualized in living by an ophthalmoscope.

  7. Lacrimal artery • Branches • To lacrimal gland • Two zygomatic branches • Lateral palpebral branches to eyelids • Recurrent meningeal branch • Muscular branches.

  8. Main trunk • Short and long ciliary arteries • Supraorbital and supratrochlear arteries • Anterior and posterior ethmoidal branches • Media; palpebral branch • Dorsal nasal branch

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  10. Middle meningeal artery • Origin and course • First part of maxillary artery given in infratemporal region • Passes through through two roots of auriculotemporal nerve • Enters the cranial cavity through foramen spinosum • Lies closer to the squamous part of temporal bone

  11. Division and branches • Divides into two • A)Anterior or frontal :larger branch lies closer to pterion.lies close to motor cortex of cerebrum • B)Posterior or parietal.

  12. branches Gives branches to 1)Duramatar 2)Trigemminal ganglion 3)Tensor tympani 4)Anastomotic branch with lacrimal artery.

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