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 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?

The two major anatomical divisions of the nervous system are the

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Natural selection tends to correlate the structures of a nervous system with an animal's interaction with the environment. A good example are sessile or slow-moving mollusks such as clams, which

You start to fall but then catch yourself, regaining your balance. Which of the following brain regions is responsible for the rapid coordination of muscle activity that kept you from falling?