Lecture 48 - Brain Anatomy 2 Flashcards
which of the following vessels provides blood supply to the brain of both dogs and cats
a. maxillary artery
b. basilar artery
c. internal carotid
d. arterial circle
d. arterial circle
do clinical signs in the telencephalon occur ipsilateral or contralateral
contralateral
what is the inter thalamic adhesion
fusion of left and right thalami surrounded by the 3rd ventricle
what is the relay nucleus
the thalamus for somatosensory input
what serves as the relay center for vision and hearing
diencephalon
lateral geniculate nucleus
vision relay
medial geniculate nucleus
auditory relay
T/F: the hypothalamus has autonomic and endocrine functions
TRUE
what is polydipsia commonly associated with in the brain
pituitary gland tumors
the tectum is ____ while the tegmentum is _____
sensory; motor
the oculomotor nerve exits the brain _____ while the trochlear nerve exits the brain ____ in regards to the mesencephalon
ventrally, dorsally
give the reflex for:
rostral colliculi
visual
give the reflex for:
caudal colliculi
auditory
the pretectal nuclei is involved in what reflex
pupillary light reflex
T/F: the tegmentum contains both UMN and LMN
TRUE
UMN nuclei in the mesencephalon control ____ movement
voluntary
What is the red nucleus and what is its significance?
an important UMN nucleus for voluntary movement in cats and dogs
what is the reticular formation
diffuse network of nuclei and tracts that integrates information from multiple areas
what is considered the seat of consciousness? what does this mean?
the ascending reticular activating systems (ARAS)
allows response to sensory input; lesions result in a depressed state of consciousness
the ________ is a common site for CSF obstruction
mesencephalic aqueduct
lesions that obstruct the ventricular system can cause clinical signs referable to what area of the brain
mesencephalon and forebrain
T/F: majority of visual field is viewed by the contralateral eye
FALSE - ipsilateral; binocular vision
depth perception is related to
how much of the optic fibers cross in the optic chiasm
describe: reflex
protective, no cerebral processing
ex: PLR, spinal, palpebral
describe: response
perception of sensory stimuli, cerebral processing
ex: menace response, proprioception
if there are both visual and pupillary deficits, what structures are impaired?
retina
optic nerve
optic chiasm
optic tract
if there are only pupillary deficits, what structures are impaired?
pretectal nucleus
the parasympathetic nucleus of CN3
CN3
ciliary ganglion
ciliary nerve
constrictor m
if there are only visual deficits, what structures are impaired?
lateral geniculate
optic radiation
occipital cortex
