Note – to do this lab you must start with an EMPTY stomach. This means not having eaten for AT LEAST 3 hours.
To determine the relationship between the frequency and power of EGG activity on an empty stomach.
Note: You must have an empty stomach. You should not have eaten any food for at least 3 hours prior to this experiment.
To determine the relationship between the frequency and power of EGG activity on a full stomach.
Note: You will need to eat a small meal. Have some food ready to eat. This can include a sandwich, fruit, desert and a small non-carbonated drink.
The stomach muscles contract at regular intervals, giving a repeating rhythmic electrical signal that is recorded by the electrodes placed on the abdomen. In a person at rest with an empty stomach, the rhythm of the contraction is approximately three cycles per minute or about 0.05 Hz. The power and frequency of the signal will change after the individual eats a small meal.
Note – if you do not see a change, or the change is not what you expected, be sure to explain this.