Week 9 - CNS

Question 1

Define a neuraxis

Answer 1

Directional terms relative to an imaginary line drawn through spinal cord and front of brain

Question 2

3 different anatomical planes

Answer 2

1= Horizontal Section (Burger Bun)
2= Saggital Section (Hot dog Bun)
3= Coronal Section (Slicing Bread)

Question 3

Define Miniges

Answer 3

Outer tough layer between skull and brain / spinal cord -subarachnoid space (cerebrospinal fluid)
INFECTION CALLED MENINGITIS

Question 4

Features of the blood brain barrier

Answer 4

Semi-permeable to allow O2/CO2 through , useful substances (AA, Glucose , etc) but also harmful such as nicotine and heroine

Question 5

4 ventricles in the ventricle system

Answer 5

Lateral Ventricle
Cerebral Aqueduct
Third Ventricle
Fourth Ventricle

Question 6

Define Brain Placicity

Answer 6

Ability of the NS to change activity in response to stimulus

Question 7

Features of the Midbrain

Answer 7

Mesencephalon :
Tectum (Auditory/Visual) and Tegmentum (Sensory + Motor)
Major pathway for sensory and motor impulses

Question 8

Features of the forebrain

Answer 8

Diencephalon: Thalamus receiving sensory info , hippocampus maintains homeostasis
Telencephalon: hemispheres (right, left, corpus callosum, cerebral cortex)
Limbic System

Question 9

4 parts of the limbic system (Forebrain)

Answer 9

Cingulate Gyrus (emotion control)
Fornix (links hippocampus to hypothalamus)
Amygdala (emotion / motivation)
Hippocampus (memory)

Question 10

Features of the Longitudinal Fissure (Forebrain)

Answer 10

Divides left and right hemisphere of brain
3 major grooves form division of key lobes - frontal and parietal lobe , temporal and occipital lobe

Question 11

Define ventral and dorsal direction

Answer 11

Ventral = towards FRONT of body / BOTTOM of head
Dorsal = towards BACK of body / TOP of head

Question 12

Define Anterior and Posterior direction

Answer 12

Anterior = nose end
Posterior = tail end

Question 13

Define lateral and medial directions

Answer 13

Lateral = towards sides
Medial = towards middle

Question 14

Define bilateral , ipsilateral , and contralateral directions

Answer 14

Bilateral = Both sides of head/body
Ipsilateral = Same side of head/body
Contralateral = Opposite side of head/body

Question 15

Features of the hindbrain

Answer 15

Medulla oblongata (cardiac resp , resp , muscle tone)
The pons (bridge between midbrain and hindbrain)
Myelencephalon (Cerebellum , communicates to motor / sense organs , balance etc)