BS2014 Neuroscience (Neuroscience (Human vs mouse differences (increased…
glial cells structurally support dendrites
controls extracellular space composition
interact with synapses and blood vessels.
forms scar tissue after injury
extensions form myelin sheath to insulate multiple internodes of an axon
microglia = brain macrophage
CNS myelinated by ogliodendrocytes
PNS myelinated by 1 Schwann cell per internode of an axon.
C. elegan vs human vs rat similarities
long axis neuronal chain/ spinal chord
cluster of neurones in head
sensory, motor, visceral
Sensory neurones concentrated dorsally & in head
Motor neurones concentrated ventrally
Human vs mouse differences
increased cerebral cortex size
perpendicular bend at midbrain
Forebrain /catherine hates british tea
Cerebrum covered in cerebral cortex
Dorsal surface view
Cerebral cortex lobes / fuck the piss off
Lateral surface view
midbrain / shitty catherine
hindbrain / catherine makes pancake
brain stem complex = midbrain + pons + medulla
Vertebrae column structural cross section
There are 30 pairs of spinal nerve fibres extruding from spinal cord.
Vertebral column and meninges cover spinal cord.
Spinal nerves emerge between vertebral columns.
Meninges covers brain and spine = dura mater + arachnoid + pia
Blood brain barrier restricts entry of serum protein into CNS
Formed by the tight packing of neural capillary cells without intercellular cleft.