Nervous system Flashcards
To have a grasp of this vitla subject
Name the 2 principle types of cell which form the nerve tissue of the nervous system
Neurons (responsible for active transmission of messages Glial Cells ( responsible for support, packing and insulation)
What are the 3 parts that the nerve cell consists of?
Cell body, Nerve fibre, nerve ending
what is the structural difference between white matter and grey matter
white matter is nerve fibres covered in myelin sheath. grey is aggregation of cell bodies.
where is the grey matter primarily located in the a) brain b) spinal cord
a) outer surface or cortex. b) centrally
Name the 3 fascial sheaths of a nerve, outermost first
- Epinenurium, 2. perineurium 3. endoneurium
Name the 2 parts that makes up the nervous system
CNS and PNS
Name 2 parts of PNS
Cranial nerves, spinal nerves.
Name the 2 physiological parts of the NS. What are the difference
- Somatic nervous system SNS , this is voluntary under conscious control 2. Autonomic NS- ANS this is involuntary generally not under conscious control.
What are the 2 divisions of the ANS and a brief explanation of each one
- Sympathetic division- ‘fight, flight and fright’ concerned with responses to external environment and activationg the body for external emergencies. 2. Parasympathetic division- vegetative functions ie building up resourses, digestion, immune system…..
in the SNS what do motor neurones do?
stimulate skeletal muscle
In the SNS what do sensory nerves do?
from periphery to CNS pain, temp, proprioception, vision etc these are perceived consciously
why is the spinal cord shorter than the vertebral column?
because the spinal cord grows more slowly than the vertebral column
where does the pia mater terminate in the vertebral column?
L2 in adults. L4 in newborn baby
At which vertebral level does the dura and arachnoid mater continue to?
S2
What is a cisternae?
these are areas of accumulation of CSF within the subarachnoid space.
where in the spine does the 1. cauda equina start and finish 2. Filum terminale
1.L2 to S2 2. S2 to the cx 1