This is a clear and well-structured breakdown of how physical disabilities originate and manifest across the nervous system and body.
Breakdown of Physical Disabilities
Key Etiologies (Causes)
Congenital Conditions: Present from birth due to genetic factors, developmental interruptions, or birth trauma (e.g., Spina Bifida, Cerebral Palsy).
Acquired Conditions: Triggered post-birth by external events, trauma, or sudden medical illness (e.g., Stroke, Traumatic Brain Injury, Spinal Cord Injury).
Progressive Conditions: Degenerative illnesses in which symptoms gradually worsen over time (e.g., Muscular Dystrophy, Multiple Sclerosis, Parkinson's Disease, Rheumatoid Arthritis).
Affected Anatomical Structures
| Region / System | Functional Role | Impact of Damage or Dysfunction |
| Cerebral Cortex (Motor Cortex) | Voluntary movement planning and execution | Paralysis, spasticity, loss of fine motor skills |
| Cerebellum | Coordination, posture, and fine balance control | Ataxia (uncoordinated movements), intention tremors, gait instability |
| Brain Stem | Autonomic, vital life functions & cranial nerve regulation | Impaired breathing, heart rate dysregulation, swallowing difficulties (dysphagia) |
| Spinal Cord & Peripheral Nerves | Signal transmission between brain and body | Loss of sensation, reflex changes, localised weakness or paraplegia/tetraplegia |
| Musculoskeletal System | Structural integrity, movement force, joint flexibility | Muscle atrophy, contractures, joint stiffness, reduced force production |
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