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reticular formation - Coggle Diagram
reticular formation
nuclei
precerebellar nuclei
projections into cerebellum
raphe nuclei
serotonin
suppress pain awareness
role in sleep
central group nuclei
lateral movement of eyes
some serotonin neurons
descending axons
reticulospinal tracts --> motor
ascending axons
maintaining consciousness
cholingergic and catecholamine cell groups
catecholamine --> locus coeruleus
function not entirely understood
modulated by other nuclei
cholinergic neurons help bring you back to consciousness
parvocellular reticular area
reflexes concerned with feeding
swallowing
parabrachial area
taste
relay for visceral sensations
respiratory rhythm
sleep apnea
superficial medullary neurons
cardio and respiratory regulation
area postrema
lacks BBB
may function in vomiting
accessory occulomotor nucleus
analgesia
contributes to
sleep-arousal
REM sleep
muscles relaxed
difficult to arouse
inhibition of transmission of sesnory stimulus
from the thalamus to the CC
cerebral cortex very active
dreaming
neuroanatomical correlates
consciousness
bilateral destruction of the medial parts
of the brain stem = irreversible coma
intact rostal pontine reticular formation
and central tegmental area essential
need normal functioning of your noradrenergic neurons'
locus coeruleus
histamine of neuronal origin = arousal
tubomamillary nucleus
sleep
rostral raphe nuclei involved in sleep
EEG
awake
low voltage
high frequency
desynchronisation
thalamocortical circuits
deep sleep
taller waves
longer waves
REM sleep
EEG desynchronised
deep sleep
serotonergic raphe
perception of pain
central group
poorly localised pain
descending pathway inhibits
transmission of pain
block it and you will feel pain
stimulate it and you block pain
electrical stimulation
raphespinal tract (reticulospinal pathway)
modulation of pain sensation
serotonergic neurons
chronic pain can be modulated
with antidepressants
control of movement
major descending pathways are
reticulospinal tract
corticospinal tract
vestibulospinal tract
regulation of visceral activity
cardio and respiratory regulation
superficial medullary
dorsal part of brain stem
direct and indirect connections to all levels of CNS
neurons have very long dendrites