Patient 1: Mr. R. Clinical Summary:A 65-year-old male presen…

Patient 1: Mr. R. Clinical Summary:A 65-year-old male presents with muscle rigidity, resting tremors, and a shuffling gait. He reports difficulty initiating movement but no sensory loss. Neurological imaging shows decreased activity in the substantia nigra. Guiding Questions: Which neurotransmitter is most likely dysregulated in this patient? Describe how this neurotransmitter normally regulates motor function in the basal ganglia. Explain how the loss or deficit of this neurotransmitter alters synaptic transmission and leads to the observed motor symptoms. Predict one pharmacological approach that could help restore normal signaling and explain why it would be effective.