The nurse assesses a client with a history of migraine headaches. Which clinical manifestation would the nurse identify as an early sign of a migraine with an aura?

Choice A reason: There is total absence of dopamine at receptors in brain cells controlling motor movement, causing Parkinson symptoms to appear, is not the correct statement. Parkinson disease is not caused by a complete lack of dopamine, but by a gradual loss of dopamine-producing neurons in the substantia nigra, a part of the brain that regulates movement. The symptoms of Parkinson disease, such as tremor, rigidity, and bradykinesia, appear when about 80% of the dopamine neurons are lost.

Choice B reason: There is an excess of dopamine production and deficiency of acetylcholine production, is not the correct statement. Parkinson disease is not caused by an excess of dopamine, but by a deficiency of dopamine. Dopamine is a neurotransmitter that helps to control movement, balance, and coordination. Acetylcholine is another neurotransmitter that works in opposition to dopamine. When dopamine is low, acetylcholine becomes dominant and causes abnormal muscle movements.

Choice C reason: There is a decreased production of dopamine and excess of acetylcholine, is the correct statement. Parkinson disease is caused by a decreased production of dopamine and excess of acetylcholine. This creates an imbalance in the neurotransmitters that regulate movement, leading to the characteristic symptoms of Parkinson disease, such as tremor, rigidity, and bradykinesia.

Choice D reason: There is a deterioration of the myelin sheath of the basal ganglia and the person has tremors, is not the correct statement. Parkinson disease is not caused by a deterioration of the myelin sheath, but by a degeneration of the dopamine neurons. Myelin is a fatty substance that covers the axons of the nerve cells and helps to transmit electrical impulses. The basal ganglia are a group of structures in the brain that are involved in movement, learning, and emotion. Tremors are one of the symptoms of Parkinson disease, but they are not the only or the most specific one.

Choice A reason: Assessment of arms and legs movement is an important part of the neurological assessment, but it is not the critical focus of care for a patient with a spinal cord injury at the cervical 5 vertebra. This level of injury affects the phrenic nerve, which controls the diaphragm and breathing. The patient may have difficulty breathing or require mechanical ventilation.

Choice B reason: Evaluation of knee jerk reflex is not the critical focus of care for a patient with a spinal cord injury at the cervical 5 vertebra. The knee jerk reflex is controlled by the spinal cord segments L2-L4, which are below the level of injury. The patient may have normal or exaggerated reflexes, depending on the extent of the spinal cord damage.

Choice C reason: Measurement of vital signs is a routine part of the nursing care, but it is not the critical focus of care for a patient with a spinal cord injury at the cervical 5 vertebra. The patient may have abnormal vital signs due to the injury, such as low blood pressure, slow heart rate, or irregular temperature. However, these are not as life-threatening as respiratory failure.

Choice D reason: Evaluation of respiratory status is the critical focus of care for a patient with a spinal cord injury at the cervical 5 vertebra. The patient is at high risk of respiratory compromise due to the impairment of the phrenic nerve and the diaphragm. The nurse should monitor the patient's oxygen saturation, respiratory rate, depth, and rhythm, and provide oxygen therapy or mechanical ventilation as needed. The nurse should also assess the patient for signs of respiratory infection, such as fever, cough, or sputum.