Wahrnehmung Und Kognition at Universität Konstanz | Flashcards & Summaries

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Wo fängt die Sinnesverarbeitung (sensory processing) an?
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In den receptor cells in den sensory receptor organs
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Are all sensory organs excited by any type of stimulus?
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No, only by the adequate stimulus
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All different senses use action potentials for conduction. How does the brain know how to differentiate them?
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It works with the concept of labeled lines. The modalities send their axons along seperate nerve tracts.
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What is sensory transduction?
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The process in which a receptor cell converts the energy generated by receptor potentials into a change in the electrical potential across its membrane. The neural activity leads to sensory perception.
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How does neural activity represent the original stimuli?

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coding: patterns of action potentials that differ in frequency of action potentials

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What is range fractionation?

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multiple neurons can act in parallel; as the stimulus strengthens more cells with increasingly higher thresholds start to fire action potentials

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What is adaptation, when does it occur and what are the two types of receptors one can differentiate concerning adaptation?

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adaptation is the progressive loss of response and occurs when a stimulation is maintained. One can differentiate between tonic and phasic receptors. Tonic receptors show no or only little decline in firing action potentials when a stimulus is maintained, phasic receptors decrease the AP frequency strongly.

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Apart from adaptation, what are other ways to control information?

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Accessory structures such as eyelids and also top-down processing, where the higher brain centers suppress some sensory inputs and amplify others

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Each sensory system has a distinct sensory pathway. What have most pathways in common?

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Most of them pass through the thalamus as a major gateway for all stimuli

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Stimuli that are passed along the sonsory cranial nerves move to the brain stem, then the thalamus and finally the primary sensory cortical areas. Stimuli that travel via the sensory peripheral nerves have an extra step. Which one?

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They first travel through the spinal cord and then all the other structures.

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What is a receptive field?

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The space in which a stimulus will alter a neuron's firing rate

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Was sind die drei großen Bereiche des Wahrnehmungsprozesses?
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Stimulus, Electricity, Experience and action
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Q:
Wo fängt die Sinnesverarbeitung (sensory processing) an?
A:
In den receptor cells in den sensory receptor organs
Q:
Are all sensory organs excited by any type of stimulus?
A:
No, only by the adequate stimulus
Q:
All different senses use action potentials for conduction. How does the brain know how to differentiate them?
A:
It works with the concept of labeled lines. The modalities send their axons along seperate nerve tracts.
Q:
What is sensory transduction?
A:
The process in which a receptor cell converts the energy generated by receptor potentials into a change in the electrical potential across its membrane. The neural activity leads to sensory perception.
Q:

How does neural activity represent the original stimuli?

A:

coding: patterns of action potentials that differ in frequency of action potentials

Mehr Karteikarten anzeigen
Q:

What is range fractionation?

A:

multiple neurons can act in parallel; as the stimulus strengthens more cells with increasingly higher thresholds start to fire action potentials

Q:

What is adaptation, when does it occur and what are the two types of receptors one can differentiate concerning adaptation?

A:

adaptation is the progressive loss of response and occurs when a stimulation is maintained. One can differentiate between tonic and phasic receptors. Tonic receptors show no or only little decline in firing action potentials when a stimulus is maintained, phasic receptors decrease the AP frequency strongly.

Q:

Apart from adaptation, what are other ways to control information?

A:

Accessory structures such as eyelids and also top-down processing, where the higher brain centers suppress some sensory inputs and amplify others

Q:

Each sensory system has a distinct sensory pathway. What have most pathways in common?

A:

Most of them pass through the thalamus as a major gateway for all stimuli

Q:

Stimuli that are passed along the sonsory cranial nerves move to the brain stem, then the thalamus and finally the primary sensory cortical areas. Stimuli that travel via the sensory peripheral nerves have an extra step. Which one?

A:

They first travel through the spinal cord and then all the other structures.

Q:

What is a receptive field?

A:

The space in which a stimulus will alter a neuron's firing rate

Q:
Was sind die drei großen Bereiche des Wahrnehmungsprozesses?
A:
Stimulus, Electricity, Experience and action
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