Lab 2 Flashcards
Identify this structure:
Caudate nucleus
Identify this structure:
thalamus
Identify this structure and what type of information is sent here?
lateral geniculate nucleus of the thalamus; visual information
Identify this structure and what type of information is sent here?
medial geniculate nucleus of the thalamus; auditory information
Identify this structure:
white matter
Identify this structure:
grey matter
Identify this structure:
Caudate nucleus
Identify this structure:
corpus callosum
Identify this structure:
internal capsule
Identify this structure:
thalamus
Identify this structure:
Caudate nucleus
Identify this structure:
corpus callosum
Identify this structure:
internal capsule
Identify this structure:
thalamus
Identify this structure:
hypothalamus
What is the functional difference between the corpus callosum and the internal capsule?
The internal capsule brings information from the cerebrum to the corpus callosum which then communicates it with the opposite side of the brain
In humans, an experimental surgery that transplants dopamine producing cells into the caudate nucleus is performed to improve some patients Parkinson’s disease. If you were to practice this surgery on a dog, how would you surgically access the caudate nucleus with minimal damage to other neural tissues?
sever the corpus callosum in half
Identify this structure and what is it in charge of?
rostral colliculus; visual reflex
Identify this structure and what is it in charge of?
caudal colliculus; auditory (BANG) reflex
Identify this structure:
trochlear nerve
Identify this structure and what is located within this structure?
crus cerebri; cerebral motor tracts
Identify this structure:
oculomotor nerve
What is the anatomical basis of clinical signs seen with ptosis?
CN III is damaged therefore the levator palpebrae superioris is not functioning properly; droopy eyelid
What is the anatomical basis of clinical signs seen with lateral strabisimus?
CN III is damaged therefore the dorsal and medial rectus are not functioning properly; the eye points ventrally and laterally
Identify this structure and what is its function?
cerebral aqueduct; communication between the 3rd and fourth ventricles
Identify this structure and what does it consist of (i.e. what makes it up)?
tectum; rostral and caudal colliculi
Identify this structure and what is located here?
tegmentum; reticular formation, and motor and sensory nuclei
Identify this structure:
cerebral aqueduct
Identify this structure:
tectum
Identify this structure:
tegmentum
Identify this structure:
rostral colliculus
Identify this structure:
crus cerebri
Identify this structure:
cerebral aqueduct
Identify this structure:
tectum
Identify this structure:
tegmentum
Identify this structure:
medial geniculate nucleus of the thalamus
Identify this structure:
rostral colliculus
Identify this structure:
cerebral aqueduct
Identify this structure:
crus cerebri
Identify this structure:
medial geniculate nucleus of the thalamus
Identify this structure:
tectum
Identify this structure:
tegmentum
What major midbrain structures represent the tectum?
rostral colliculus, caudal colliculus
What functional deficits woud you expect to see with a lesion of the internal capsule?
information from the cerebrum would not get to the corpus collosum and vice versa
Where is the lesion in a dog displaying ventrolateral strabisimus of the right eye?
CN III - right
What geniculate nucleus works closely with the occipital lobe?
lateral
If the eyes fail to follow your moving hand in front of the animal’s face, what nerve(s) could be inured?
CN III and VI
What structure of the midbrain gives rise to the trochlear nerve?
crus cerebri
What clinical sign would you expect to see when the motor nocleus of the trochlear nerve is involved in the lesion of the right midbrain in a dog or cat?
the dorsal oblique on the left side would not function properly
What would you expect to see if the right trochlear nerve is inflamed in a dog or a cat?
periodic symptoms with the left eye
What is the functional difference between the lateral geniculate nucleus and the rostral colliculus?
the lateral geniculate nucleus is for vision, the rostral colliculus is for a vision reflex
Is the crus cerebri part of the sensory or motor system?
motor system
Where do fibers of the crus cerebri originate?
cerebral cortex
List three clinical signs induced by a lesion of the right oculomotor nerve.
ptosis, lateral strabisimus, no pupillary response in the right eye
