Other Flashcards
What is volume (amplitude) measure in?
Decibel
What is pitch (frequency) measure in?
Hertz
What is neurotransmission dependant on?
Transmitter synthesis
Vesicle fusion
Occupation of post synaptic receptors
What is neurotransmission modulated by?
Transmitter re-uptake
Occupation of presynaptic receptors
What are the two main peripheral neurotransmitters?
Acetylcholine (somatic and parasympathetic)
Noradrenaline (sympathetic)
What are the two MAJOR neurotransmitters in the CNS and ar they inhibitory or excitatory?
Excitatory- glutamate
Inhibitory- GABA and glycine
What are the four main modulatory neurotransmitters in the CNS.
Dopamine
Serotonin
Noradrenaline
Acetylcholine
What is dopamine important in?
Cognition
Excess leads to schizophrenia
What is acetylcholine important in?
Cognition and memory
Deficiency may lead to Alzheimer’s
Serotonin and noradrenaline are important in……
Mood
Deficiency leads to depression
Where are pyramidal cells found?
Cerebrum
Where are purkinje cells found?
Cerebellum
What are the three main spinal tracts?
Dorsal column
Spinothalamic
Coticospinal (motor)
Describe the dorsal column tract?
What’s it for and what is it split into?
For proprioception Gracile (medial-lower body) Cunate (lateral-upper body) First neurone enters dorsally Synapse at medulla then deccusates Synapse at hypothalamus 3rd neurone travels to sensory cortex
Describe the spinothalamic tract
What is it for?
Pain and temp Neurone enters dorsally Synapse in spinal cord then decussates 2nd synapse at thalamus Third neurone goes to sensory cortex
Describe the corticospinal tract
1st motor neurone from motor cortex
Decussates at lower medulla
Synapses at anterior horn
Exits spinal cord travels to target muscle
What is the function of the occulomotor cranial nerve?
Eye movement
Iris and lense
What is the function of the trochlear cranial nerve?
Eye movement upwards
What is the function of the abducens nerve?
Abductors of eye
Lateral movement
What is the function of the vestibulocochlear nerve?
Hearing and balance
What is the function of the glossopharyngeal nerve?
Swallowing
Glands
Taste
Cardiovascular
What are commissar all fibres?
They join the two hemispheres
Most are gathered in the corpus callosum
What are association fibres?
They are confined to their own hemispheres
They connect diff parts of the cortex
What are projection fibres?
They connect the brain stem with the spinal cord