Neuro Block Iii - Viii

Front 1

What are the four functions of limbic lobe

Back 1

H- homeostasis
O-olfaction
M- memory
E- emotions and drive

Front 2

List all structures that are included under limbic lobe

Back 2

Hypothalamus – homeostasis
Olfactory cortex – olfaction
Hippocampal formaton - memory
Amygdala – emotions and drive

Front 3

What are the three parts of hippocampal formation

Back 3

Subiculum
Hippocampus
Dentate gyrus

Front 4

What type of cells are seen in dentate gyrus?

Back 4

Granule

Front 5

What type of neurons are seen in hippocampus?

Back 5

Pyramidal cells.

Front 6

What is the origin and termination of fornix?

Back 6

Hippocampus to mamillary body

Front 7

What are the two structures separated by the hippocampal sulcus?

Back 7

Dentate gyrus from subiculum.

Front 8

Trace the perforant pathway

Back 8

Entorhinal cortexperforant pathwaydentate gyrusCA3fornix and Schaffer collaterals.
Schaffer collateralsCA1 pyramidal cellsfornix and subiculum
Subiculumfornix and entorhinal cortex

Front 9

What type of fibers arise from the dentate gyrus and where do they terminate?

Back 9

Mossy fibers, terminate in CA3 pyramid cells

Front 10

What are Scheaffer’s collaterals?

Back 10

Axon collaterals that start in CA3 and go to CA1

Front 11

Where do you see the long term potentiation?

Back 11

Perforant pathway

Front 12

What happens to the synapses in long term potentiation?

Back 12

plastic

Front 13

Sclerosis of hippocampus results in what/

Back 13

Epilepsy, seizures.

Front 14

Where is amygdaloid body is situated and what is its function?

Back 14

It is a group of nuclei present in the anteromedial part of the temporal lobe in the roof of the inferior horn of the lateral ventricle. Fear memory.

Front 15

What is the name of the structure that carries fibers from amygdaloid body?

Back 15

Stria terminalis

Front 16

What is Sommer’s sector?

Back 16

( Other name of CA1 is Sommer’s sector)

Front 17

Which part of the hippocampus is sensitive to anoxia?

Back 17

CA1

Front 18

Where do seizures begin in temporal lobe?

Back 18

Hippocampus

Front 19

What is Kluver Bucy syndrome?

Back 19

When both amygdalas are removed, the behavior is placid, tame and nonagressive. These symptoms constitute Kluver-Bucy syndrome. Sticking shit in your mouth and trying to hump everything.

Front 20

Trace the Papez circuit?

Back 20

Subiculum of hippocampusfornixmamillary nuclei of mamillary bodyanterior thalamic nucleuscingulate gyruscingulumparahippocampal gyrusentorhinal cortex hippocampus

Front 21

When the shamrage results in an experimental animal?

Back 21

Lesion of anterior hypothalamus results in “sham rage” in which sudden outbursts of aggression occur

Front 22

Which part of the hypothalamus is sectioned in schizophrenics and to control malignant hypertension?

Back 22

Posterior or more precisely posteriomedial.

Front 23

What is the blood supply of median diencephalic structures?

Back 23

Artery of percheron

Front 24

What is Entorhinal cortex?

Back 24

Memory center in brain

Front 25

What is the name of the fibers which extend from CA3 to CA1?

Back 25

Schaefffer collaterals and mossy fibers.

Front 26

What is the range of frequency that human ear is adopted to respond?

Back 26

20-2000HZ

Front 27

Conversational speech is equivalent to how many decibels?

Back 27

65db

Front 28

Trace the auditory pathway from the spiral ganglion to the transverse Heschl’s gyrus?

Back 28

Spiral ganglionauditory nerveventral and dorsal cochlear nucleitrapezoid bodysuperior olivelateral lemniscusinferior colliculusmedial geniculate bodyauditory cortex(transverse Heschl’s gyrus

Front 29

What is impedance matching?

Back 29

This matching of output at the oval window equal to the input sound energy at the tympanic membrane is impedance matching

Front 30

How much enhancement of pressure over the oval window is possible due to the middle ear mechanism?

Back 30

20 times greater

Front 31

What is attenuation reflex?

Back 31

The onset of a loud sound triggers a neural response that causes the two middle ear muscles to contract

Front 32

What are the two muscles that help in the attenuation reflex? And what is their nerve supply?

Back 32

Tensor tympani – mandibular nerve and stapedius – facial nerve

Front 33

What is the name of the central pillar of the cochlea?

Back 33

Modiolus

Front 34

How many rounds the scala winds around the central pillar of cochlea?

Back 34

2 and a half.

Front 35

What are the two compartments which contain the perilymph?

Back 35

Scala vestibuli and scala tympani

Front 36

What is the compartment that contains the endolymph?

Back 36

Scala media

Front 37

Which structure helps to maintain the high concentration of potassium in the endolymph?

Back 37

Endothelium lining wall.

Front 38

What is endocochlear potential? And who much is that?

Back 38

The potential of fluid in the endolymph, plus 80mv

Front 39

What membrane separates the scala vestibuli from the scala tympani?

Back 39

Helicotrema

Front 40

What is the membrane over which organ of corti is situated?

Back 40

Basilar membrane

Front 41

What is the name of the membrane that roofs the organ of corti?

Back 41

Tectorial membrane