A patient has a disorder that causes repeated, uncontrolled movements of the right hand. Region X is deep inside the patient's brain.
During an operation, a doctor uses a tiny electrode to stimulate region X. The movements stop while X is stimulated and start again when stimulation stops. The doctor considers using repeated stimulation of X as a treatment.
State what the results suggest about the function of region X.
The patient can be conscious while region X is stimulated.
Give one reason why stimulating the brain itself does not cause pain.
Suggest one way repeated stimulation could improve the patient's quality of life and one risk to brain function from positioning the electrode in region X.
4 exam-style questions on AQA GCSE Biology 5.2.2 The brain. Each one has a worked solution and a mark scheme showing where the marks go.