Exam 2 Flashcards
1
Q
Cortex Afferents
A
- Corticocortical = II, III
* Thalamocortical = III, IV
2
Q
Cortex Efferents
A
- Coritcocortical = II, III, V, VI
- Corticothalamic = VI
- V = Corticobulbar, Corticopontine, Corticostriatal, *Corticospinal, Corticoreticular
3
Q
Localization of cortical function
A
- Frontal = voluntary movement
- Occipital = vision
- Parietal = visual motion processing, attention, orientation
- Temporal = hearing, speech, visual object recognition
- Cingulate = emotions, basic desires
4
Q
Types of white matter bundles
A
- Association bundles = connect on the same side
- Projection bundles = bring info into and out of cortex, from/to subcortical structures
- Commisural bundles = connect between hemispheres
5
Q
What are the 4 parts of the thalamus that we need to know?
A
- Lateral Geniculate = primary visual cortex
- Medial Geniculate = auditory cortex
- Reticular = inhibits thalamic activity
- Ventral posterior = somatosensory cortex
6
Q
Pathway of information for smell
A
- Odorant binds to cilia in mucous layer
- OSN is depolarized, action potential occurs, signal passes through cribriform plate to glomerulus via CN I
- Synapse at glomerulus, NT released to mitral cell in olfactory bulb
- Signal is passed down olfactory tract to the ipsilateral olfactory cortex (no thalamus!), amygdala, entorhinal, olfactory tubercle
- Amygdala also passes info to hypothalamus, thalamus, and OFC
- Entorhinal cortex passes info to the hippocampus
7
Q
Taste vs. Flavor
A
Taste = excitation of gustatory system Flavor = combo of gustatory + olfactory + somatosensory
8
Q
5 tastants
A
Sweet Sour Salty Bitter Umami
9
Q
Where are taste buds found?
A
Tongue Palate Epiglottis Esophagus Pharynx
10
Q
What cranial nerves correspond to each of the taste bud parts?
A
CN VII = 2/3 anterior tongue, palate
CN IX = 1/3 posterior tongue, pharynx
CN X = esophagus, epiglottis
11
Q
What are the ganglia for each of the CNs that innervate the taste buds?
A
CN VII = geniculate ganglion
CN IX = petrosal ganglion
CN X = nodose ganglion
