Medicine

Mechanics of flow

Principle

The Doppler effect is used with ultrasonic waves to investigate the laws of stationary laminar flow, which underlie a great many technical applications. The liquid under investigation flows through a circuit of tubing. Particular aspects to be studied experimentally ...

Velocity of ultrasound in solid state material

Principle

The velocity of sound in acrylics shall be determined by time of flight reflection technique with an ultrasonic echoscope. The measurements are done, by reflection method, on three cylinders of different length. Two measurement series are carried out with ultrasonic ...

Mechanical scan methods

Principle

A computer-controlled scanner is used to make a B scan of a test body using two probes of different frequency (1 MHz and 2 MHz) and various locating resolutions. A comparison is then made between the effects on the resolution capabilities.

Ultrasonic computer tomography

Principle

First an explanation of image generation using the CT algorithm is given. An attenuation and sound speed tomogram is then made on a simple test object and any differences are then discussed.

Image inversion and accommodation

Myopia - Hyperopia

Electronystagmography

Principle

Electronystagmography (ENG) is an electrophysiological diagnostic procedure for measuring the movement of the eyes. Several electrodes measure the potential differences that are caused by the eye movements. When looking at a moving, regular, repetiti ...

Vision defects (model experiment)

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 high stimul ...

Structure and function of the human eye

Short-sightedness and its correction (myopia)

Long-sightedness and its correction (hyperopia)

We investigate our heartbeat - electrocardiography

Principle

The heart is a hollow, muscular organ that comprises several secondary muscles. These secondary muscles contract and relax successively, thus pumping the blood through the heart. These muscle activities can be measured electrically as a whole at the ...