A 30-year-old female presents with muscle weakness in the lower extremities and palpitations. Her symptoms have been progressively worse over the course of a 2 weeks. She reports to be in great health, but had a period of abdominal pain and diarrhea approximately 5 weeks ago. Her temperature is 98.9 deg F (37.2 deg C), blood pressure 117/82 mmHg, pulse is 102/min, and respirations are 16/min. On physical exam, there is 4-/5 muscle strength throughout the lower extremities. Bilateral patellar reflexes are 1+ and ankle reflexes are absent. Lumbar puncture was performed, and results are pending. Part 2: What is the most appropriate initial treatment?

A 30-year-old female presents with muscle weakness in the lower extremities and palpitations. Her symptoms have been progressively worse over the course of a 2 weeks. She reports to be in great health, but had a period of abdominal pain and diarrhea approximately 5 weeks ago. Her temperature is 98.9 deg F (37.2 deg C), blood pressure 117/82 mmHg, pulse is 102/min, and respirations are 16/min. On physical exam, there is 4-/5 muscle strength throughout the lower extremities. Bilateral patellar reflexes are 1+ and ankle reflexes are absent. Lumbar puncture was performed, and results are pending. Part 2: What is the most appropriate initial treatment?

A 34-year-old woman presents with neck pain. She is accompanied by her husband, who says she appears to have right-turning, tremor-like movement of the neck. The patient describes the pain as muscle spasm-like, and states that her symptoms improve with rest and sleep. She has recently begun taking Citalopram due to being diagnosed with major depressive disorder. She denies any alcohol or illicit drug use. On physical examination, there is right head turning with left lateral head tilt. Jerky head tremor is noted, with spasm and hypertrophy of the left sternocleidomastoid muscle. Which of the following is most likely the diagnosis?

A 68-year-old woman is brought to her primary care physician by her son due to concerns about her behavior over the past 9 months. He reports that there were times she would leave the stove on after she finished cooking, causing her husband to always check the stove after meals. Even though he would tell the patient he will be visiting her in a few weeks, she completely forgets when he arrives. He has also noticed she is mildly irritable at things that usually would not bother her. Past medical history is unremarkable, and her only medication is a multivitamin. She is a retired secretary and currently lives with her husband. Her vital signs are unremarkable. Montreal Cognitive Assessment (MoCA) testing is significant for impairments in visuospatial function and memory (0/5 items on delayed recall, even with cues). The rest of the neurological exam is unremarkable. TSH and vitamin B12 tests are normal. Which of the following is most likely to be found on histology?

The two major anatomical divisions of the nervous system are the

During transmission across a typical chemical synapse,