Lab 3 Blood Supply and CSF ARTERIAL SUPPLY

Lab 3 Blood Supply and CSF

ARTERIAL SUPPLY TO SPINAL CORD & BRAIN

Spinal Cord Arteries From posterior spinal anastomoses -nutrient branches that supply dorsal columns and posterior horn (posterior 1/3) From anterior spinal system -nutrient branches that supply most of spinal cord (anterior 2/3) Occlusion of the artery of Adamkiewicz 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.

REGIONAL ARTERIAL SUPPLY OF THE SPINAL CORD

VENOUS RETURN FROM THE SPINAL CORD Spinal cord plexus

ARTERIAL SUPPLY TO THE BRAINSTEM Short circumferential pontine arteries – see lecture notes

ARTERIAL SUPPLY TO THE BRAINSTEM

THE GREAT ARTERIAL CIRCLE OF WILLIS anterior communicating artery

Neighboring structures of Willis Cortical Branches

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

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

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

REGIONAL ARTERIAL SUPPLY TO SPINAL CORD AND BRAIN STEM Cervical Enlargement Thoracic Lumbar Posterior Spinal Arteries Anterior Spinal Arteries See Haines pg 95 Sacral

PERFUSION PATTERNS OF THE MEDULLA

PERFUSION PATTERNS OF THE MEDULLA Anterior Spinal Artery Posterior Spinal Artery Vertebral Artery Pg 194 of notes has abreviation key Posterior Inferior Cerebellar

PERFUSION PATTERNS OF THE PONS

Pons Paramedian Br. Of Basilar a. Short Circumferential Br of Basilar Artery Long Circumferential Branches of Basilar and AICA Long Circumferential Branches of Basilar and Superior Cerebellar Pg 196 of notes has abreviation key

Pons 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 + some supply from the superior cerebellar artery

PERFUSION PATTERNS OF THE MIDBRAIN

MIDBRAIN Major Supply = Posterior Cerebral Artery 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 + some supply from the superior cerebellar artery Pg 198 of notes has abreviation key

Midbrain 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 + some supply from the superior cerebellar artery

general area supplied by the anterior and posterior spinal artery systems in the spinal cord

vertebral arteries and areas supplied by anterior spinal, vertebral, and PICA in the mid/rostral medulla

basilar artery and areas supplied by its branches in the caudal pons

posterior cerebral arteries and areas supplied by its branches (and those of the basilar) at the level of the rostral midbrain

VENOUS DRAINAGE OF SPINAL CORD AND BRAIN

DEEP CEREBRAL VEINS

CRANIAL AND SPINAL MENINGES

CEREBROSPINAL FLUID SYSTEM Lateral aperture

RADIOGRAPHS

at level of the cervical spinal cord (#28), find the subarachnoid and epidural spaces

at the level of the cauda equina (#36), find the subarachnoid and epidural spaces

at the level of the medulla (#32), find the subarachnoid space, IV ventricle, lateral apertures ,

at level of pons (#30), find the subarachnoid space (pontine cistern) , IV ventricle

at level of midbrain (#31), find the subarachnoid space (interpeduncular and superior cisterns) , cerebral aqueduct , and temporal horn & atrium of lateral ventricle

at the level of the forebrain (#33), find the subarachnoid space , frontal horn and atrium of lateral ventricle, interventricular foramen , third ventricle