Review the following case study:

Chief Complaint:

A 23-year-old woman presents with complaints of muscle weakness in the face.

History:

The patient is a 23-year-old administrative assistant who complains
of intermittent muscle weakness in her face that has been getting worse
over the past 3 months. She also states that as she chews, her jaws feel
tired. Swallowing has also become difficult. She reports episodes of
double vision (diplopia), which seems to occur after reading for a few
minutes in the late evening. With certain strenuous activities or after
typing for long periods of time at work, she reports problems with
bilateral arm weakness.

Physical Examination:

Notable ptosis (drooping) of the eyelids after repeated blinking
exercises. When asked to smile, she appears to be snarling. Reflexes and
sensation are normal in both upper and lower extremities. There is
considerable weakness of the arms noted bilaterally after exercise.

Case Questions:

1. Is the patient’s condition neurological, musculoskeletal, or both?
   Explain why and support your thoughts with evidence-based literature.
   What would be a possible neurologic or musculoskeletal condition causing
   the symptoms?
2. Explain the pathophysiology behind the condition.
3. What pharmacological agent(s) are commonly used to treat the
   disorder and how do the agent(s) alter the pathophysiology of the
   condition?
4. What would be your educational plan for the patient?