Compare spastic and dyskinetic cerebral palsy in terms of underlying neuropathology, typical motor signs, and associated comorbidities.

• A. Spastic CP from upper motor neuron injury with hypertonia and brisk reflexes; dyskinetic CP from basal ganglia involvement with choreoathetoid movements and fluctuating tone; CP often with epilepsy, visual/hearing impairment, feeding issues
• B. Spastic CP from basal ganglia; Dyskinetic CP with hypertonia; CP often with no epilepsy
• C. Spastic CP with normal reflexes; Dyskinetic CP with hyperreflexia
• D. Both CP types have identical neuropathology

Answer: (A)

Distinguishing spastic from dyskinetic cerebral palsy hinges on where the brain injured pathways are and how that shapes movement and tone. Spastic cerebral palsy comes from injury to the upper motor neuron pathways, mainly the corticospinal tracts. This produces increased muscle tone (hypertonia) and brisk reflexes (hyperreflexia), with movements that are stiff, patterned, and posture-driven. Dyskinetic cerebral palsy, on the other hand, results from damage to the basal ganglia circuits that regulate movement, leading to involuntary movements such as chorea and dystonia with tone that can fluctuate—from hypotonia to dystonic hypertonia—rather than a consistently stiff pattern.

In terms of associated problems, many individuals with cerebral palsy have epilepsy and sensory impairments (visual or hearing issues) and feeding or oromotor difficulties; this pattern can appear with either type, though the motor signs and the underlying brain injury differ as described above.

The other statements don’t fit because spastic CP is not caused by basal ganglia injury, and dyskinetic CP is not defined by persistent hyperreflexia or normal reflexes as a hallmark. Also, CP does not have identical neuropathology across types, and the expectation of no epilepsy is not supported by common comorbidity patterns.