Neurobiology

Experiments with 1 Neurosimulator and Cobra3

The following experiments can be performed:

• Intracellular potential and action potential
• Comparison between low and high threshold levels
• Comparison between low and high stimulus levels
• Membrane time constant and low-pass filtering
• Memb ...

Neurobiology: nerve cell interactions

Neurobiology: neural networks

The following experiments can be performed:

With 1 Neurosimulator:

• Intracellular potential and action potential
• Comparison between low and high threshold levels
• Comparison between low and hig ...

Recording of nerve and muscle potentials by mechanical stimulation at the rear end of an earthworm (Cobra3)

Principle and tasks

To work on the following themes by measuring nerve and muscle potentials:

• the course of a biphasic action potential over time
• estimation of the conduction velocity
• coding of the stimulant intensity as frequency modulation ...

Recording of nerve and muscle potentials by mechanical stimulation at the front end of an earthworm (Cobra3)

Principle and tasks

To work on the following themes by measuring nerve and muscle potentials:

• The difference in sensitivity of the front and rear ends
• The facilitation effect
• Conduction velocity and fibre diameter
• Synaptic depress ...

Recording of nerve potentials after the electrical stimulation of an anaesthetised earthworm (with the Cobra3 Basic-Unit

Principle and tasks

To work on the following themes by measuring nerve and muscle potentials:

• The action of an anaesthetic
• The different conduction velocities of median and lateral giant fibres
• Refractory period of the median giant fibre

Neurosimulator: membrane time constant and low-pass filte-ring (with the Cobra3 Basic-Unit)

Principle and tasks:

To use a nerve function model to work onthe following themes:

• The time constant of the nerve membrane and intracellular potential
• The low-pass characteristic of the nerve membrane

What you can le ...

Neurosimulator: mode of operation of excitatory synapses (with the Cobra3 Basic-Unit)

Principle and tasks

To use a nerve function model to work on the following themes:

• The origin of action potentials
• The transformation of stimulation intensity to action potential frequency

What you can learn about

Neurobiology: the nerve cell

Principle and tasks

To use a nerve function model to study the following aspects of a nerve cell: intercellular potential and actionpotential.

What you can learn about

• Comparison between low and high threshold levels
• Comparison b ...

Neurobiology: nerve cell interactions

Principle

To use a nerve function model to study the following aspects of nerve cell interactions with other nerve cells or with motoric and sensoric cells:

Renshaw inhibtion

• Motoneuron signals wit ...

Neurobiology: neural networks

Principle, tasks and what you can learn about:

To use a neve function model to study the following aspects of neural networks:

TRANSIENT (PHASIC) RESPONSES: FOCUS ONVISUALSENSE

• Transient responses: ON neu ...

Neurobiology: complex neural networks

Principle, tasks and what you can learnabout

To use a nerve function model to studythe following aspects of neuralnetworks:

• Direction selectivity by unilateralinhibition
• Self-calibration of paired sensorychannels

Determination of the human visual field

Principle and tasks

Determination of the visual field of the right and left eye for white, blue, red and green. Detection of any visual field deficiency (scotoma). Location of the blind spot (site of optic nerve emergence). The extent of the visual fields of bo ...

Time resolving capability of the human eye

Principle and tasks

To determine the flashing frequency of an LED at which the impression of a continuous light just occurs. To change the direction of incidence of the light using a perimeter. To determine the flicker fusion thershold of the left and right eye in relation to ...

Geometric dilution series

Principle
A dilution series is started with a solution in a defined concentration, which is then continuously diluted by a defined factor. The solution obtained in this manner is then used as the starting point for the next solution.

Tasks
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