Question

Which is/are TRUE?

a. Auditory tuning curves are similar to receptive fields that we discussed for touch and vision, except auditory tuning curves are based on frequency, not a map of spatial locations (like in vision and touch).

b. Hair cells and auditory nerve fibers have “V” shaped tuning curves.

c. Auditory tuning curves are broad in the superior colliculus (the nucleus that guides orientation reflexes) and narrow in the inferior colliculus (the nucleus that processes the meaning of sounds).

d. All of the above are True

e. None of the above are True

Answer 1

ANSWER :-

1. Auditory timing curves provide information regarding the output in terms of threshold values to a particular stimulus being external sound input in case of the above mentioned curves. The auditory as well as visuals and somatosensory receptive fields deals with the response to a particular stimuli and can be highlighted in terms of detecting the signal by means of specific receptors or space (fields that create stimulation) although this varies between the auditory and the other two processes. In case of visuals receptive fields, the mapping and orientation plays a vital role which can be stated in terms of the V1, V4 and the V5 visuals domains that mediate a complex activity. The projections and spatial alignment in terms of line projections can also be considered. In simple terms, the movement of the line in a particular plane is used to orient and specify a particular threshold. In terms of space through which a stimulus is relayed to initiate a response, the mechanism is similar for all the three mentioned receptor fields. The neurons located near the peripheral areas as can be seen in case of retinal and thalamic neurons, the development of response depends mainly upon the orientation, direction of an object more specifically dealing with line movements and the receptive field is more stronger depending upon the contrast of the image and thus processing mainly depends upon mapping of the object as can also be seen in case of touch associated response which shows a relatively similar approach in terms of signal recognition. Although, in case of auditory tuning curve, there is basically detection of frequency which can be mediated towards the cochlear filters that mediate a threshold response. Taking all the points into consideration, option 'A' is true.
2. Hair cells forms a part of the basillar membrane and the auditory neurons showing presence of the nerves fibres that integrate into various integrating centres. Both these structures do not show much variations in terms of signal recognition as the threshold value generally depends upon the intensity of the sound waves from the external source that in turn leads to development of a particular threshold frequency which doesn't vary for both the structures indicating similarities and association with each other and thus can be represented in the form of V-shaped curves that are characteristics of auditory tuning curves. So, option 'B' is considered true.
3. The superior colliculi and the inferior colliculi are separated by means of the neurons from the inferior colliculi that align themselves at the border of both the structures. The tuning graph for inferior colliculi is narrow as it deals with a relatively smaller range and is specific to a particular frequency range. This in turn leads to a frequency which is relatively narrower than that seen in case of superior colliculi. This is because the response mediated by superior colliculi is quick and intense as can be stated in such a way that the voice at one end can be heard at a small time variation than that at other end which indicates time associated frequency (threshold response) generation is more specific to the intensity of the signal and positioning does not affected these rates as can be seen to play an integral role in visual and somatosensory response. So, option 'C' can be considered to be true.
4. As all the above mentioned option is correct , option 'D' is consideRed correct.
5. The option 'E' is not appropriate as option 'D' is correct option.

According to me, option 'D' is the most appropriate answer.

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