Which of the following is a treatment method for Parkinson's disease?

The injection of fetal cells that produce dopamine represents a potential treatment method for Parkinson's disease aimed at addressing one of the core issues of the condition: the loss of dopaminergic neurons in the brain. Parkinson's disease is characterized by a significant decrease in dopamine levels due to the degeneration of the substantia nigra, a critical area responsible for movement control.

By introducing dopaminergic cells, the intention is to restore the balance of neurotransmitters in the brain, alleviating some motor symptoms associated with Parkinson's disease, such as tremors, rigidity, and bradykinesia (slowness of movement). This approach is based on the premise that these fetal-derived cells could integrate into the existing neural circuitry and produce dopamine, potentially mitigating the effects of the disease.

The other methods listed do not address the biochemical deficiencies seen in Parkinson's disease. Progressive muscle relaxation may aid in stress relief and muscle tension, but it does not tackle the fundamental neurological deficits. Psychotherapy can support individuals in coping with the psychological aspects of the disease, such as anxiety and depression, but it does not directly treat the motor symptoms or restore dopamine levels. Electroconvulsive therapy (ECT) is primarily used for severe depression and is not a recognized treatment for Parkinson's