33. UMN lesions

Question 1

What is upper motor neuron lesion?

Answer 1

AKA pyramidal, a lesion in the neural pathway above the anterior horn cell of the spinal cord or motor nuclei of the CN.

Question 2

Causes

Answer 2

Occur in conditions affecting motor neurons in the brain or spinal cord
- Stroke, MS, traumatic brain injury and cerebral palsy, IC tumor, cervical spine injury

Question 3

Signs and symptoms

Answer 3

Mus. weak.
Decreased control of active move.
Spasticity
Babinski reflex: Present
Increase deep tendon reflex
Pronator drift