Topography of Brain and Spinal Cord (Task 2)

Question 1

Components of white matter

Answer 1

Myelinated axons

Question 2

Components of grey matter

Answer 2

Unmyelinated axons, dendrites, neuron cell bodies

Question 3

Dominate hemisphere for language comprehension and expression

Answer 3

Left in most cases but not always

Question 4

Grey matter outer layer of brain

Answer 4

Cerebral cortex

Question 5

Nerves running in dorsal and ventral rami

Answer 5

Dorsal - Sensory nerves

Ventral - Motor nerves

Question 6

Cell body types found in dorsal root ganglion

Answer 6

Pseduounipolar cell bodies

Question 7

Axons connecting cortical regions in same hemisphere

Answer 7

Association fibres

Question 8

Axons connecting the two hemispheres

Answer 8

Comissural fibres (e.g. corpus callosum)

Question 9

Contents of projection pathways

Answer 9

Afferent (arrive to brain) and efferent (exit brain) fibres which connect lower brain to spinal cord

Question 10

Blood supply to basal ganglia

Answer 10

Lenticulostriate arteries (branch from Middle Cerebral Arteries)

Question 11

Blood supply to the thalamus

Answer 11

Posterior Communicating Artery (Branch from Posterior Cerebral Artery)

Question 12

Features of posterior cerebral artery syndrome

Answer 12

PCA supplies Occipital lobe, inferomedial Tempral lobe, Thalamus, Brain Stem and Midbrain
Contralateral left or right visual field loss (hemianopia)
Cortical blindness
Visual agnosia
Prosopagnosia
Visual ataxia 
Dyslexia 
Mild aphasia

Question 13

Features of middle cerebral artery syndrome

Answer 13

Hemiparesis/plegia of contralateral lower face and extremities
Sensory loss of contralateral face, arm and leg
Contralateral ataxia
Speech impairments/aphasia
Perceptual problems (neglect, apraxia)