1 2 3 4 5 7 Occlusion of the artery of Adamkiewicz (large medullary artery) could result in infarction of lower thoracic and upper lumbar areas of the cord producing a loss of sensation and voluntary movement inferior to this level. 6

1 2 3 4

1 2 3 4 5 6 7 8 9 10 11 12 13 14

8 1 2 3 4 5 9 10 6 11 7 12

anterior communicating artery 1 9 10 11 12 13 2 3 4 5 14 6 15 7 16 8 17 18

1 middle cerebral artery (p. 17, 2-10) - in the lateral fissure      - has cortical branches that supply the lateral cortex

1 anterior cerebral artery (p. 27, 2-25) - in the mid-sagittal fissure      - cortical branches supply medial frontal & parietal cortex

1 posterior cerebral artery (p. 19, 2-13; p. 27, 2-25) - winds around the midbrain - cortical branches supply the medial occipital and   medial & inferior temporal cortex

Posterior Spinal Arteries Cervical Enlargement Thoracic Lumbar Sacral 1: Blood Supply Posterior Spinal Arteries 2: Blood Supply Anterior Spinal Arteries

1 4 2 5 3 6 Caudal Medulla Mid/Rostral Medulla

4 3 2 1 Caudal Pons

Pons 4 3 Paramedian br of Basilar bifurcation Medial parts of Post. Cerebral and post. Communicating Short Circumferential br of Post cerebral and sup. cerebellar Long circumferential of PCA Long circumferential of PCA + some supply from the superior cerebellar artery 1 2 2 1 3 4

5 4 3 2 1 Midbrain

Midbrain 4 3 2 1 Paramedian br of Basilar bifurcation Medial parts of Post. Cerebral and post. Communicating Short Circumferential br of Post cerebral and sup. cerebellar Long circumferential of PCA Long circumferential of PCA + some supply from the superior cerebellar artery 1 2 3 4

1 3 2 4 Internal Carotid A. Posterior Cerebral A. Posterior EYE Internal Carotid A. 1 Posterior Cerebral A. 3 Posterior Communicating Artery 2 TEMPORAL LOBE MIDBRAIN 4 SUBARACHNOID SPACE

Basilar artery 1 Vertebral aa. 2 Medulla Subarachnoid space Lateral aperture IV Ventricle Basilar artery 1 Vertebral aa. 2 Medulla

1 Internal carotid a. post. communic. a. 2 Middle cerebral a. 4 Posterior cerebral a. 3 Posterior cerebral a. 5 Rostral Midbrain

What is the order of venous drainage of the spinal cord? Spinal cord plexus What is the order of venous drainage of the spinal cord? Spinal Veins → Vertebral Venous Plexus → Neighboring Regional Veins

What is the order of venous drainage of the brain? 4 1 2 3 What is the order of venous drainage of the brain? Deep Cerebral Veins → Superficial Cerebral Veins → Intradural Venous Sinus → Internal Jugular Vein

1 4 3 2

4 3 2 5 1 6 7 8 9 10 11 12 13 14 15 16 Lateral aperture 19 17 18

1 2

2 1 3 4

3 1 2 4 Quadrigeminal Cistern (superior cistern) Interpeduncular Cistern Pontine Cistern 2 Cisterna Magna (cerebellomedullary cistern) 4

8 1 9 2 10 3 4 11 5 12 6 13 7 AREAS OF SUBARACHNOID SPACE (SAS): outer or peripheral SAS surrounding hemisphere Sulcal SAS Superior or quadrigeminal cistern Interpeduncular cistern pontine (prepontine) cisterna magna AREAS OF VENTRICULAR SYSTEM: Lateral ventricle position of interven- tricular foramen III ventricle Position of Cerebral aqueduct IV ventricle at level of lateral aperture (foramen of Luschka) Median aperture (foramen of Magendie) 1 8 9 2 10 3 4 11 5 12 6 13 7 Spinal SAS

1 2 3 lumbar cistern Entrance route into the lumbar cistern below the Spinal cord L1 Termination of spinal cord subarachnoid space 2 lumbar cistern Nerve roots of cauda equina 3 Entrance route into the lumbar cistern below the L3 vertebral spine L5 S1 Termination of subarachnoid space, arachnoid, and dura

2 3 1 4 Vertebral Body Subarachnoid Space (bright in MR-T2 images) Location of the arachnoid (inner layer) and dura (outer layer) 3 1 Cauda Equina small amount of epidural fat 4

1 Epidural space 2 Subarachnoid Space

What is at the tip of the black arrows? Subarachnoid Space (dark) 1 General position of cochlear nuclei Lateral aperture 2 IV ventricle 3 What is at the tip of the black arrows? Cerebellar Tonsils

4 1 5 6 2 3 Basilar Artery subarachnoid space in sulci between gyri of temporal lobe pontine (prepontine) cistern IV ventricle 4 Basilar Artery 1 5 6 Middle cerebellar peduncle 2 3 cerebellum

(faint, look on other side too) 5 temporal horn of lateral ventricle (faint, look on other side too) 5 Subarachnoid Spaces (SAS): position of cerebral aqueduct 6 1 supratentorial SAS around hemispheres sulcal SAS interpeduncular cistern superior cistern atrium of lateral ventricle 7 2 3 occipital horn of Lateral ventricle 8 4

Internal Capsule longitudinal fissure Frontal horn of lateral 4 Frontal lobe Frontal horn of lateral ventricle 4 lateral fissure insula Internal Capsule Temporal lobe thalamus Interventricular foramen 5 Subarachnoid space: outer sulcal superior cistern 6 III Ventricle 1 2 7 Atrium of lateral ventricle 3 Occipital lobe

parietal or frontal lobe Internal capsule (posterior limb) body of lateral ventricle III ventricle longitudinal fissure, with subarachnoid CSF 1 3 2 sulcal SAS with CSF 4 Thalamus parietal or frontal lobe Internal capsule (posterior limb) lateral fissure with subarachnoid CSF 5 Lesion (cyst) temporal lobe temporal horn of lateral ventricle 6 interpeduncular cistern (SAS between cerebral peduncles) 7