1008HSV Lecture Notes - Pia Mater, Dura Mater, Cerebrospinal Fluid
20 Jun 2018
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Week 6 - 14th April
The spinal cord: outer white matter
Inner grey
The brain: Outer grey, middle white, inner grey
Grey: nerve cell bodies, no myelin
White: axon fibres, myelin present
ENDOCRINE (“ductless” hormone secretion straight into body) AND
EXOCRINE (secrete products to the surface of the body, ducts secrete)
Know gigantism
Basic structure of neuron
Cerebral white matter:
Made up of axons (nerve fibres) that allow
Three types of fibres:
Commissural fibres (between left and right hemisphere)
Association fibres (within hemisphere, from front of right hemisphere to back etc),
between gyri (folds) in the same hemisphere
Projection fibres (from cerebral cortex to body, nd back) form descending and ascending
tracts
Ependymal cells: make cerebrospinal fluid in CNS
Oligodendrocytes: make myelin in CNS
CFS (Cerebrospinal Fluid): maths an protects CNS from injury, prevents entry of invading
organisms, provides nutrients and O2 to nerve tissue, removes waste, allows flotation of brain in
the skull
Hydrocephalus: water on the brain, abnormal over-production of CFS, pressure increases, skull
bones seperate, head enlarges
Transillumination: used to detect presence of fluid within the skull
Meninges: covering of the CNS system, of the brain
Dura mater: outer, attached to the skull
Arachnoid mater: middle, like a spider’s web, collagen/elastic fibres
Pia mater: inner, attached to brain/spinal cord surface
KNOW FOR EXAM
Cerebrospinal fluid flows between arachnoid and pia matter
Spinal cord: tubular structure with “frayed” tail
4 Sets of Spinal Nerves leaving Spinal Cord:
Cervical spinal nerves
Thoracic spinal nerves
Lumbar spinal nerves
Sacral spinal nerves
Grey matter arranged in the shape of a butterfly
Doral horns (back):
sensory nerves, bringing back information from sensory receptors to spinal cord and then to
brain. Enter spinal cord as afferent fibres
Lateral horns (side):
Sides of the butterfly, sympathetic branch of the autonomic nervous system (part of
peripheral nervous system), leave spinal cord as visceral sympathetic fibres. Stimulate gut
secretion, involuntary motor movements
Ventral horns (front):
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
The brain: outer grey, middle white, inner grey. Endocrine ( ductless hormone secretion straight into body) and. Exocrine (secrete products to the surface of the body, ducts secrete) Made up of axons (nerve bres) that allow. Association bres (within hemisphere, from front of right hemisphere to back etc), between gyri (folds) in the same hemisphere. Projection bres (from cerebral cortex to body, nd back) form descending and ascending tracts. Cfs (cerebrospinal fluid): maths an protects cns from injury, prevents entry of invading organisms, provides nutrients and o2 to nerve tissue, removes waste, allows otation of brain in the skull. Hydrocephalus: water on the brain, abnormal over-production of cfs, pressure increases, skull bones seperate, head enlarges. Transillumination: used to detect presence of uid within the skull. Meninges: covering of the cns system, of the brain. Arachnoid mater: middle, like a spider"s web, collagen/elastic bres. Pia mater: inner, attached to brain/spinal cord surface. Cerebrospinal uid ows between arachnoid and pia matter.
