NSG Knowledge Update

Question 1

Branches off C1 segment?

Answer 1

1. None.

Question 2

Branches off C2 segment?

Answer 2

1. None.

Question 3

Branches off C3 segment?

Answer 3

1. None.

Question 4

Branches off C4. segment?

Answer 4

1. Meningohypophyseal trunk and includes the following branches: tentorial arteries of Bernasconi and Cassinari, dorsal meningeal artery and inferior hypophyseal artery.

Question 5

Branches off C5 segment?

Answer 5

1. None.

Question 6

Branches off C6 segment?

Answer 6

1. Ophthalmic artery.

2. Superior hypophyseal artery.

Question 7

Branches off C7 segment?

Answer 7

1. PCom.

2. Anterior choroidal.

Question 8

What are the segments of the MCA?

Answer 8

1. M1 - horizontal or sphenoidal segment.
2. M2 - insular segment.
3. M3 - opercular segment.
4. M4 - cortical segment.

Question 9

Course of the M1 segment.

Answer 9

1. MCA from origin at ICA terminus to the MCA bifurcation.

Question 10

Branches off the M1 segment.

Answer 10

1. Lenticulostriate perforating arteries.

2. Anterior temporal artery.

Question 11

Course of the M2 segment.

Answer 11

1. MCA from bifurcation to circular sulcus of insula, most commonly inferior and superior trunks.

Question 12

Course of the M3 segment.

Answer 12

1. Branches from circular sulcus of insula over operculum to surface of Sylvian fissure.

Question 13

Course of the M4 segment.

Answer 13

1. Branches to lateral convexity.

Question 14

Territory supplied by the recurrent artery of Heubner?

Answer 14

1. Head of the caudate.
2. Anterior limb of the IC.
3. Putamen and globus pallidus.

Question 15

Course of the A1 segment.

Answer 15

1. ACA from origin at ICA terminus to ACOM.

Question 16

Course of the A2 segment.

Answer 16

1. ACA from ACOM to origin of callosomarginal artery.

2. Most common segment for origin of recurrent artery of Heubner.

Question 17

Course of the A3 segment.

Answer 17

1. ACA from origin of callosomarginal artery to superior surface of corpus callosum.

Question 18

Course of the A4 segment.

Answer 18

1. Pericallosal artery.

Question 19

Course of the A5 segment.

Answer 19

1. Terminal branches.

Question 20

Gerstmann syndrome.

Answer 20

1. Dominant parietal lobe lesion.

2. Agraphia, acalculia, R-L confusion, finger agnosia.

Question 21

Course of the V1 segment.

Answer 21

1. From of the origin off the subclavian to the level of C6 transverse foramen.

Question 22

Course of the V2 segment.

Answer 22

1. Traverses the cervical spine from C6 to C2 transverse foramen.

Question 23

Course of the V3 segment.

Answer 23

1. From the C2 transverse foramen until the artery pierces the dura.

Question 24

Course of the V4 segment.

Answer 24

1. Intracranial portion of the VA traversing the medulla anterolaterally.

Question 25

Course of the P1 segment.

Answer 25

1. From the BA apex to the PCOM.

Question 26

Course of the P2 segment.

Answer 26

1. From PCOM to the inferior temporal branches in the perimesencephalic cistern.

Question 27

Course of the P3 segment.

Answer 27

1. Starts distal to the origin of the inferior temporal arteries and ends at the start of the calcarine fissure.

Question 28

Course of the P4 segment.

Answer 28

1. Traverses posteromedial within the calcarine fissure and supplies the splenial artery.

Question 29

Territories supplied by the temporal branches of the PCA.

Answer 29

1. Uncus, parahippocampus, and medial and lateral occipitotemporal gyri.

Question 30

Territories supplied by the occipital branches of the PCA.

Answer 30

1. Lingual and cuneal gyri of the occipital lobe.
2. Primary and visual association areas.
3. Posterolateral surface of the occipital lobe.
4. Inferior surface of the temporal lobe.