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

Appeared in: NORCET-7 Mains-2024

Explanation

Cerebral palsy is a group of permanent disorders affecting the development of movement and posture, leading to activity limitations.
The question specifically describes features of Dyskinetic Cerebral Palsy, which is caused by damage to the extrapyramidal system (basal ganglia).
This damage results in impaired voluntary muscle control, involuntary movements, and abnormal posture, directly matching the question's description.

Why Other Options Were Wrong

Option A: This is an inflammation of the brain and spinal cord membranes (meninges), primarily caused by infection, not a primary extrapyramidal disorder.
Option C: This is an autoimmune disorder affecting the neuromuscular junction, leading to muscle weakness and fatigue. It does not involve the extrapyramidal system.
Option D: This is a progressive neurodegenerative disease primarily causing cognitive decline and memory loss (dementia) due to cortical atrophy. Motor symptoms are typically a late feature.

Related Visual

An illustration of the human brain, highlighting the different areas affected by the main types of cerebral palsy: the motor cortex spastic, the basal ganglia dyskinetic, an...

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 care for individuals with cerebral palsy, focusing on maximizing mobility, preventing contractures through range-of-motion exercises, ensuring safety from falls, and providing family education and support.
Understanding the specific type of cerebral palsy helps nurses anticipate needs, such as managing spasticity in spastic CP versus controlling involuntary movements in dyskinetic CP.
What if? If the patient presented with progressive cognitive decline and memory loss with motor symptoms appearing much later in life, the most likely diagnosis would shift from cerebral palsy to Alzheimer's disease.

How to Approach the Question

First, identify the key terms in the question: 'impaired movement,' 'loss of voluntary control,' 'posture,' and most importantly, 'extra pyramidal system'.
The term 'extrapyramidal system' is the critical clue, pointing to a specific part of the brain's motor system (including the basal ganglia) that regulates involuntary movements and posture.
Next, evaluate each option based on this key clue.
Meningitis is an infection. Myasthenia gravis affects the neuromuscular junction. Alzheimer's affects the cortex and cognition. None of these are primarily defined by a disorder of the extrapyramidal system.
Cerebral palsy, specifically the dyskinetic type, is defined by damage to the extrapyramidal system, making it the correct match for the symptoms described.

Concept Tested & Keywords

Concept Tested: Pathophysiology of Extrapyramidal Movement Disorders
Stem keywords: Impaired movement, loss of voluntary control, posture, abnormality, extra pyramidal system
Lead-in keywords: is known as
Negative lead-in flag: false

Question ID

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Reference Book

E6 Nursing Fundamentals Potter Perry 12e Part 4 p. 129-131

E6 Robert Boland, Marcia L. Verduin - Kaplan and Sadock's Comprehensive Text of Psychiatry-Wolters Kluwer Health (2024) (pp 1-16525 of 16525) p. 1559-1561

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