Anatomy
Cerebral hemisphere: Posterior limb of external capsule, Pons: Basis pontis
Vascular
- Middle cerebral artery: Small penetrating arteries
- Basilar artery: Small penetrating arteries
Signs & Symptoms
| Side | Manifestation | Comments |
|---|---|---|
| Contralateral | Weakness – upper and lower extremity | |
| Contralateral | Ataxia – arm and leg |
Notes
Weakness usually more prominent in leg than arm; extensor plantar response; no facial involvement or dysarthria. Other locations include thalamocapsular lesions, red nucleus, anterior cerebral artery distribution. Also called “homolateral ataxia and crural paresis.”