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19 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Bifurcation of common carotid artery occurs at |
Level of C4 vertebrae |
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Division of courses of internal carotid artery |
Cervical part Petrous part Cavernous part Cerebral part |
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Explain the course of internal carotid artery |
From point of origin - through carotid sheath in cervical region- through carotid canal in petrous part - enters cavernous sinus through foramen lacerum - at the anterior end of cavernous sinus it enters through the sub arachnoid space |
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Branches of cerebral part of internal carotid artery |
Ophthalmic artery Anterior choroidal artery Anterior cerebral artery Middle cerebral artery Posterior communicating artery |
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What is the origin of vertebral artery? |
Subclavian artery |
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According to the course of vertebral artery, what are the parts of vertebral artery |
Cervical Vertebral Suboccipital Cerebral |
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Explain the course of vertebral artery |
From the point of origin - Till entering foramen transversarium - through the 6 cervical vertebrae - horizontal part in suboccipital triangle - enter cranial cavity through foramen magnum - artery lies in subarachnoid space lateral to medulla |
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Branches of cerebral part of vertebral artery |
Anterior spinal Posterior spinal Posterior inferior cerebellar Medullary Meningeal |
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The two vertebral artery unite to form |
Basilar artery |
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Branches of basilar artery |
Anterior inferior cerebellar artery Labyrinthine artery Pontine artery Superior cerebellar artery Posterior cerebral artery |
PSPLA |
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Location and shape of circle of willis |
Interpeduncular cistern and polygonal |
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Extent of circle of willis |
Superior border of pons to median longitudinal fissure |
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Functional importance of circle of Willis |
1. Equalizes pressure of blood flow on the two side of brain 2. It provides alternative route through which blood entering ica or basilar artery reach the cerebral hemisphere |
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What are circumventricular organs |
Areas in the brain devoid of blood brain barrier |
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List the circumventricular organs |
Pineal body, neurohypophysis, organum vasculosum of lamina terminal is, median eminence (hypothalamus), subcommissural organ, area postrema |
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Function of circumventricular organ |
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Draw the circle of Willis |
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Largest subarachnoid cistern |
Cistern magna |
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Structure of blood brain barrier |
Endothelial cell Basement membrane Foot process of astrocyte |
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