Lab 3

Blood Supply and CSF

ARTERIAL SUPPLY TO SPINAL CORD & BRAIN

Spinal Cord ArteriesFrom 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

Cortical Branches

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 Sacral

See Haines pg 95

Anterior Spinal Arteries

Posterior Spinal Arteries

PERFUSION PATTERNS OF THE MEDULLA

Pg 194 of notes has abreviation key

Anterior Spinal Artery

Posterior Spinal Artery

Vertebral Artery

Posterior Inferior Cerebellar

PERFUSION PATTERNS OF THE MEDULLA

PERFUSION PATTERNS OF THE 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

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

Long circumferential of PCA + some supply from the superior cerebellar artery

PERFUSION PATTERNS OF THE 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

Long circumferential of PCA + some supply from the superior cerebellar artery

MIDBRAINMajor Supply = Posterior Cerebral 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

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