CNS Flashcards
what does the parasympathetic system control
rest and digest - basic bodily functions
what separates the frontal and parietal lobes
central sulcus
what percentage of matter in the brain is grey or white
Grey matter (40%)
White matter (60%)
where does the spinal cord begin and end
begins at occiptal bone to space between the first and second lumar vertebrae
what are the 3 layers of meninges
Dura mater: outer layer, closest to your skull.
Arachnoid mater: middle layer.
Pia mater: inner layer
what are the bumps and grooves of the brain called
gyri (bumps)
sulci (groves)
what type of nerve only has efferent fibres
motor
what is in white matter
axons
what is the function of the parietal lobe
sensory (touch, temperature, pressure and
pain) and spacial information processing
what does the sympathetic system control
fight or flight
what is Autonomic imbalance
a hyperactive sympathetic system and a hypoactive
parasympathetic system,
what is in grey matter
neuronal cell bodies and their dendrites.
what cranial nerves are in the pons
vestibulocochlear, facial, trigeminal, abducens
what is the primary visual coretx
receives visual information from the eyes. This information is relayed to several secondary visual processing areas, which interpret depth, distance, location and the identity of seen objects.
what is the autonomic nervous system
mediates unconscious activities.
consists of nerves that connect the CNS to
the visceral organs
what is the role of the pons
coordination centre for signals and communications that flow between the two brain hemispheres and
the spinal cord.
what is the function of grey matter
Provides ability to think and reason.
Processing of sensation, perception, voluntary movement, learning, speech and cognition
what is the somatic nervous system
consists of nerves that go to the skin and
muscles
mediates conscious/voluntary activities.
what separates the frontal and temporal lobes
lateral sulcus
what is the function of the frontal lobe
decision making
voluntary movements
brochas area
what separates the frontal and temporal lobes
lateral sulcus
what type of nerve only has afferent fibres
sensory
what is the function of white matter
Provides communication between different grey matter areas and between grey matter and the rest of
your body.
what are the two cerebral hemispheres connected by
the corpus callosum
what is the function of the temporal lobe
memory processing
hearing (contains the primary auditory cortex)
recognising language
wernike’s area
what is the function of the occipital lobe
vision
what is the role of the cerebellum
most voluntary movements
processes nerve impulses from the inner ear (balance and posture)
what is the role of the medulla oblongata
transmitting signals between the spinal cord and
the higher parts of the brain and in controlling autonomic activities, such as heartbeat and respiration
what cranial nerves are found in the medulla oblongata
glossopharyngeal, vagus, accessory, hypoglossal
describe the activation of the sympathetic system
- Upon stimulus/threat/stress > rush of adrenaline and noradrenaline secreted from the adrenal medulla causes almost all portions of the sympathetic system to discharge simultaneously
- . ↑ arterial pressure ↑ blood flow to active muscles and ↓ blood flow to organs not needed. ↑ rates of cellular metabolism throughout body, ↑ muscle strength, ↑ mental activity, ↑ blood glucose
concentration, ↑ glycolysis in the liver/muscle.
what part of the temporal lobe is important for memory, learning and emotions.
hippocampus
what is in the hindbrain
brainstem, pons, medulla oblongata and the cerebellum
12 cranial nerves
spinal nerves are what type of nerve
mixed
