central vestibular projections Flashcards
how is vestibular info to CNS
vestibulocochlear nerve
central processes travelling in vestibular branch enter where
brainstem
pontomedullary junction
vestibular nuclei complex
receive from vestibular apparatus
major reflex pathways
vestibular nuclie complex divided into what
lateral vand medial vestibular nuclie
wheres vestibular uncle complex located
posterior tegmenjtum
lateral vestibular nuclei do what
process info from otolith (linear)
medial vestibular nuclei do what
process info semicircular (rotational)
vestibular nuclei receive afferent or efferent
afferent
why multimodal
info from vestibular, cerebellar and visual/somatosensory
T/F vestibular nuclei connect with cerebellar input
true
T/F vestibular nuclear on receive info from cerebellum
false they give to
vestibulocerebellum
parts where cerebellum and vestibular nuclei interconnected
fastigial nuclei
vestibular cervical reflex
vestibular spinal reflex
postural stability
flocculus
compensentory eye movement
vestibulo ocular reflex
nodulus
receive input from vestibular nuclei complex
oculomotor vermis
coordinates vestibular, oculomotor and cortical input
what contributes to proprioception of personal space
vestibular nuclei to cortex
vestibular cortical target
where
do what
somatosensory area
receive visual / somatosensory info
T/F there is single cortical area for input from vestibular
no
projection from vestibular nuclei reach the vestibular cortical target via
thalamus
steps in cortical projections
vestibular nuclei (brainstem)
Thalamus (Cross)
Somatosensory (primary and secondary areas)
which does conscious perception
cortex or Sc
cortex
which does vestibular reflex
cortex or Sc
Sc
vestibular nuclei 3 major reflex
vestibulo ocular reflex
vestibucervical reflex
vestibulo spinal
vestibulo ocular reflex
head moves, you look forward
adjust eye movement to head, stabilizes image
vestibulocervical reflex
postural adjustments of head / neck in response to movement
vestibulospinal reflex
postural stability of body with input to mm
left head turn
what happening in vestibulo ocular reflex
- semicircular duct detect
- afferents project to medial vestibular nuclie
- input to contralateral abducens
- innervate ipsilateral mm via CNv1
4b. innervate contralateral mm (CNIII)
vestibular could reflex rotational?
yes
vestibulocervical reflex rotational?
yes
vestibulocerival reflex through descending medial or longitundal fascicles
medial
steps vestibulocervical reflex
- semicircular detect
- project to medial vestibular nuclei
- travel I medial longitudinal facsciulaus
- input to cervical levels, head / mm movement
vestibulospinal rotiaonal?
rotational and linear
vestibuilospinal reflex detected by
semi and otolith
vestibulospinal medial or lateral vestibulopsinal tract
both
vestibulospinal reflex
rotational steps
(same as vestibulocervical)
linear steps
steps in linear acceleration vestibulospinal reflex
- otolith detect
- project to lateral vestibular nuclei
- travel in lateral vestibulospinal tract
- input all levels of SC for mm
how to detect change in balance reach CNS
vestibular ganglion
(semicircular and otolith)
to brainstem (cortex n SC)
to cerebellum