16 JULY 2019 Flashcards
the reticular formation regulates in what four areas?
the cerebellum
dorsal horn
lateral horn
ventral horn
fx of RT in cerebellum:
level of arousal
sleep / wake cycles
fx of RT in dorsal horn:
influence the synapse of the pain pathway
closes the pain gate
fx of RT in lateral horn:
autonomic control
influences peripheral ANS
visceral control fx
fx of RT in ventral horn:
cell bodies of LMN
depolarizes so lowers threshold for fight or flight can activate more quickly
dx in the sp. cord would make touch:
ipslateral
dx in the sp. cord would make pain:
opposite side
dx in the sp. cord would make motor
ipslateral
tectum is the
a roof over the 4th ventricle
has four bumps
what are on the tectum:
4 bumps:
sup and inf colliculus
superior colliculus does what
turns head in response to visual in peripheral
inferior colliculus does what
turns head in response to sound in peripheral
head in response to visual
sup colliculus
head in response to sound
inf colliculus
tegmentum:
ascending pathway including reticular formation holds the: - spinothalamic tract - medial lminscus - spinocerebellar tract
three tracts inside the tegmentum are?
spino thalamic
medial leminscus
spinocerebellar tract
where are fasciculus found?
the medulla
where are the cerebellar peduncles found?
the pons
what structure does the medulla have?
fasciculus
what structure does the pons have?
cerebellar peduncles
overall the cerebellum does three things:
coordinates movements
plan movement
shift attention
when there is dx to a vertical tract dx will be :
because it crosses in the :
contralateral
cauda medulla (corticospinal in decussation of meddual)
segmental tracts that are dx aka CN are
ipslateral
the two other places that have ipslateral dx are
the cerebellum and automatic control
what are the four Ds of brainstem dysfx:
dysphagia
dsyarthria
diplopia
dymetria
CN involved in dsyphagia:
X, IX, V, VII, XII
CN involved in dsarthria:
V. VII, XII
CN involved in diplopia:
III, VI, IV
CN involved in dymetria
no CNs but pontocerebellar fx
