Protection of CNS
firmly attached to inside of the skull
extends into some fissures
A.K.A "Tough mother"
Dura Mater
what is Sulci, Gyrus, Fissures
Sulci- shallow grooves
Gyrus- ridges
Fissure- Deep grooves (cuts)
what is the Cortical Homunculus
= little man ( a map of primary somatosensory and motor cortex )
Sensory Cortex: greater cortical representation and has high density of sensory receptors (ex tongue and lips)
Motor Cortex: greater cortical representation are sites of fine motor control (ex fingers )
what is the cerebrum and what is it responsible for ?
it is the largest part of the brain that consists of two hemispheres
(includes superficial grey matter and inner white matter and subcortical structures)
responsible for sensory interpretation, voluntary movement, language, and memory
trabeculae extend between dura and pia mater
Arachnoid Mater "spider like"
functions of your occipital lobe and what is it composed of?
- vision interpretation/processing
- primary visual cortex - awareness of visual info
Functions of the Insular lobe
- processes pain and temperature sensations
- linked to desires, cravings and addiction
- contributes to fear and avoidance in response to threatening situations
-conscious awareness of emotions
-includes gustatory cortex for taste perception
delicate layer
tightly adhered to cortex
Pia "tender mother"
what is the pre frontal lobe made up of and what are the functions?
1st part prefrontal cortex- Reasoning, planning and personality
2nd part Premotor cortex- Coordination of complex movements
Primary motor cortex- execution of voluntary movements (a.k.a pre central gyrus )
functions areas of the cerebral cortex
Wernicke's area: locations temporal lobe
Function: comprehension of speech
Brocas: location: frontal lobe
Functions: motor productions of speech
circulation of the CSF
1- the choroid plexus of each ventricle produces CSF
2- CSF flows through the ventricles and into the subarachnoid space via the median and lateral apertures
3- CSF flow through the sub arachnoid space
4- CSF is absorbed into the dural venous sinuses via the arachnoid granulations
Functions of the parietal lobe what is it composed of?
receives and interprets sensory information
composed of - Primary somatosensory cortex aka ('post-central gyrus') receives info from touch, pressure, pain and temperature receptors
what is Cerebrospinal Fluid CSF and its functions
- clear, colourless liquid
- fills the ventricles and surrounds the cns in the sub arachnoid space
functions
- protects the brain and spinal cord
- removes metabolic wastes
- provide nutrients and a stable environment
Functions of the Temporal Lobe and what is it composed of ?
processes auditory and olfactory information
- Learning
- Speech
- Memory
composed of the primary auditory cortex (auditory and processes and interprets sound)