Impaired movement and loss of voluntary control of the muscle and posture resulting from an abnormality in extra pyramidal system is known as?

1. A

   Meningitis

2. B

   Cerebral palsy

3. C

   Myasthenia gravis

4. D

   Alzheimer's disease

Appeared in: NORCET-7 Mains-2024

Explanation

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• Cerebral palsy is a group of permanent disorders affecting movement, muscle tone, and posture.
• The question specifically describes symptoms resulting from an abnormality in the extrapyramidal system.
• Dyskinetic cerebral palsy is directly caused by damage to the basal ganglia, a key part of the extrapyramidal system.
• This damage leads to involuntary movements (like athetosis and chorea) and postural instability, matching the question's description.

Why Other Options Were Wrong

• Option A: Meningitis is an infection and inflammation of the meninges, not a developmental disorder of the extrapyramidal system. Its classic signs are fever, headache, and neck stiffness.
• Option C: Myasthenia gravis is an autoimmune disorder affecting the neuromuscular junction, causing muscle weakness and fatigue. The pathology is peripheral, not in the central nervous system's extrapyramidal tracts.
• Option D: Alzheimer's disease is a form of dementia caused by cortical atrophy. It primarily affects memory and cognition. While motor symptoms can appear late in the disease, it is not defined by extrapyramidal dysfunction from its onset.

Related Visual

• Visual 1: Diagram: A diagram illustrating the different parts of the brain (motor cortex, basal ganglia, cerebellum) and highlighting which area is affected in each type of cerebral palsy (Spastic, Dyskinetic, Ataxic). This visual would clarify the anatomical basis of the different clinical presentations.
• Visual 2: Flowchart: A flowchart showing how damage to the extrapyramidal system (basal ganglia) leads to the specific symptoms of dyskinetic cerebral palsy, such as involuntary movements and abnormal posture.

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pathophysiology of Extrapyramidal Movement Disorders as background academic context rather than a clinical decision trigger.
• Nurses play a crucial role in managing patients with cerebral palsy by assisting with mobility, preventing contractures through range-of-motion exercises, ensuring safety from falls, and facilitating communication for those with speech difficulties.
• Understanding the underlying pathophysiology helps the nurse anticipate patient needs, such as the risk for aspiration in patients with dyskinetic CP who have poor control of facial and pharyngeal muscles.
• What if? If a child with known cerebral palsy suddenly develops a high fever, neck stiffness, and irritability, the nurse should suspect a superimposed infection like meningitis, which is a medical emergency requiring immediate investigation and treatment, rather than assuming the symptoms are just part of the underlying CP.

How to Approach the Question

• First, identify the key terms in the question stem: 'impaired movement', 'loss of voluntary control', 'posture', and most importantly, 'abnormality in extrapyramidal system'.
• The term 'extrapyramidal system' is the critical clue. This system is primarily involved in involuntary motor control, posture, and muscle tone.
• Next, evaluate each option based on this key clue.
• Recall or deduce the primary pathology of each condition: Meningitis (infection), Myasthenia Gravis (neuromuscular junction), and Alzheimer's (cortical dementia). None of these are primarily defined by an extrapyramidal system abnormality.
• Recognize that Cerebral Palsy is a motor disorder, and one of its main types (dyskinetic) is specifically caused by damage to the basal ganglia, which is the core of the extrapyramidal system.
• Therefore, Cerebral Palsy is the only option that directly matches the pathological location and resulting symptoms described in the question.

Concept Tested & Keywords

• Concept Tested: Pathophysiology of Extrapyramidal Movement Disorders
• Stem keywords: Impaired movement, Loss of voluntary control, Posture, Extrapyramidal system
• Lead-in keywords: is known as
• Negative lead-in flag: false

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