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CNS: Anatomy #Blood Supply the the CNS

Q1. All of the following structures are contents of the carotid sheath EXCEPT:

Common carotid artery
Internal jugular vein
External carotid artery
Vagus nerve

Q2. Regarding the subclavian artery, all statements are correct EXCEPT:

It is divided into three parts by scalenus anterior
Its second part lies anterior to scalenus anterior
Its first part extends to the medial border of scalenus anterior
Its third part begins at the lateral border of scalenus anterior

Q3. All parts of the internal carotid artery give branches EXCEPT:

Petrous part
Cavernous part
Cerebral part
Cervical part

Q4. Regarding the cavernous part of the ICA, all are true EXCEPT:

It lies within the subarachnoid space
It is surrounded by venous blood
It contributes to the carotid siphon
It lies within the cavernous sinus

Q5. The anterior cerebral artery supplies all of the following EXCEPT:

Medial surface of frontal lobe
Leg area of precentral gyrus
Medial surface up to parieto-occipital sulcus
Occipital lobe

Q6. All are features of the middle cerebral artery EXCEPT:

Largest branch of ICA
Runs in the lateral fissure
Supplies occipital lobe
Supplies most of lateral cerebral surface

Q7. Vertebral arteries pass through all of the following transverse foramina EXCEPT:

C6
C7
C5
C1

Q8. The basilar artery is formed at the level of:

Junction of pons and medulla
Upper border of pons
Midbrain
Foramen magnum

Q9. All are branches of the vertebral artery EXCEPT:

Posterior spinal artery
Anterior spinal artery
Superior cerebellar artery
Posterior inferior cerebellar artery

Q10. Regarding the posterior cerebral artery, all are correct EXCEPT:

Terminal branch of basilar artery
Smaller than ACA and MCA
Supplies occipital lobe
Turns backward at midbrain

Q11. Which vessel is NOT part of the Circle of Willis?

Anterior communicating artery
Posterior communicating artery
Posterior cerebral artery
Middle cerebral artery

Q12. Dural venous sinuses have all of the following features EXCEPT:

Presence of valves
Lined by endothelium
Located between dural layers
Drain CSF into IJV

Q13. All structures are related to the cavernous sinus EXCEPT:

Internal carotid artery
Abducens nerve
Ophthalmic division of trigeminal nerve
Facial nerve

Q14. Infection from the dangerous area of the face reaches cavernous sinus via:

Facial vein → IJV
Angular vein → superior ophthalmic vein
Retromandibular vein
External jugular vein

Q15. The superficial middle cerebral vein drains directly into:

Superior sagittal sinus
Straight sinus
Cavernous sinus
Sigmoid sinus

Q16. The great cerebral vein drains into the:

Straight sinus
Superior sagittal sinus
Cavernous sinus
Transverse sinus

Q17. Posterior spinal arteries supply which portion of the spinal cord?

Anterior 2/3
Posterior 1/3
Entire cord
Central gray matter only

Q18. Segmental spinal arteries enter the vertebral canal through:

Foramen magnum
Carotid canal
Vertebral artery groove
Intervertebral foramina