Nokea
Which finding may suggest a problem with the patient's proprioception?
- A. Difficulty standing with eyes closed or swaying when standing still.
- B. Steady gait and normal balance.
- C. Clear, intact sensation in all extremities.
- D. Normal muscle strength and coordination.
Correct Answer: A
Rationale: Proprioception issues are indicated by difficulty standing with eyes closed or swaying. Steady gait, intact sensation, and normal strength are normal findings.
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What do we call the layer of fatty tissue surrounding the axon of some neurons?
- A. cutaneous coating
- B. myelin sheath
- C. dendritic barrier
- D. synaptic sleeve
Correct Answer: B
Rationale: The myelin sheath is a layer of fatty tissue that surrounds the axons of some neurons, providing insulation and increasing the speed of electrical signal transmission. Myelin is produced by glial cells, such as oligodendrocytes in the central nervous system and Schwann cells in the peripheral nervous system. Damage to the myelin sheath, as seen in conditions like multiple sclerosis, can impair neural communication and lead to neurological symptoms.
One of the most common features of neurological disorders are Language deficits and are collectively known as
- A. Dysphasias
- B. Alogias
- C. Anomias
- D. Aphasias
Correct Answer: D
Rationale: Aphasia is a language disorder resulting from damage to the brain's language centers, typically in the left hemisphere. It affects the ability to produce or comprehend speech, read, or write. Aphasia can manifest in various forms, such as Broca's aphasia (difficulty speaking) or Wernicke's aphasia (difficulty understanding language). These deficits are common in neurological disorders like stroke, traumatic brain injury, or neurodegenerative diseases.
The area of the nervous system that is responsible for mediating reflexes is the:
- A. Medulla.
- B. Cerebellum.
- C. Spinal cord.
- D. Cerebral cortex.
Correct Answer: C
Rationale: The correct answer is C: Spinal cord. The spinal cord is responsible for mediating reflexes due to its role in transmitting sensory information to the brain and coordinating motor responses without involving higher brain centers. Reflex actions are quick, involuntary responses to stimuli that help protect the body. The medulla (A) controls vital functions like breathing and heartbeat, the cerebellum (B) coordinates movement and balance, and the cerebral cortex (D) is involved in higher cognitive functions like thinking and decision-making, but not reflex actions.
Dopamine is an important neurotransmitter. Which disease or disorder results when the neurons in the brain that produce dopamine die?
- A. Multiple sclerosis
- B. Lou Gehrig disease (amyotrophic lateral sclerosis)
- C. Parkinson disease
- D. Seizure disorder
Correct Answer: C
Rationale: Parkinson disease is caused by the degeneration of dopamine-producing neurons in the brain, leading to motor symptoms such as tremors and rigidity. Multiple sclerosis and ALS involve different neurological mechanisms, while seizure disorders are related to abnormal electrical activity in the brain. Dopamine's role in motor control is critical to understanding Parkinson disease.
In the initial nursing assessment of Mr. Singer it is important to remember that malignant rheumatoid arthritis
- A. is limited to the synovial joints
- B. may also involve the heart, lungs, and other body systems
- C. is primarily an episodic disease
- D. affects primarily the proximal joints
Correct Answer: B
Rationale: Malignant rheumatoid arthritis can affect multiple organ systems beyond the joints.