Nervous system Flashcards
CNS=
brain & spinal cord
PNS=
cranial nerves & spinal cord
Ganglia =
part of PNS. They collect neuronal cell bodies e.g., DRG
What are the two functional divisions of the CNS=
somatic nervous system- voluntary
autonomic nervous system- involuntary
Sensory Vs motor pathways
sensory= afferent
motor= efferent
Meninges of brain=
membranes that protect the brain and allow CSF to move around tissues
What are the layers of the meninges
- dura mater
- arachidonic mater
- pia mater
Subarachnoid space
between the arachnid mater and Pia mater, it consists of CSF.
CSF=
is produced in ventricles of the brain- mainly in the choroid plexus
- lateral ventricles
- 3rd ventricle
- 4th ventricle- then CSF flows into subarchanoid space
- choroid plexus of lateral ventricle
Functions of CSF=
- cushioning/ trauma
- nutritive e.g., glucose
- removes metabolites
- provides stable ionic environment
Gyri=
ridges of brain
Sulci=
are between the gyris
Grey matter=
contains nerve cell bodies, neurons, glial cells, blood vessels and have no long fibre tracts
White matter=
have fibre tracts, connects different areas of the brain. Have sensory and motor pathways that are ascending/ descending.
Frontal lobe=
Planning, emotion, mood, behaviour, motor function, smell
