Table 3.

Clinical presentation, etiology, and the vascular supply to the thalamus.

Feature	Frequency
Symptoms	Visual Disturbance = 116 (43.9%)
	Altered Mental State = 207 (77.2%)
	Memory Deficit = 15 (5.3%)
Etiology	Ischemia = 249 (96.1%)
	Perforation = 1 (0.4%)
	Stenosis = 3 (1.2%)
	Minor Arterial Disease = 2 (0.8%)
	Others = 4 (1.5%)
Sites Involved	Paramedian thalamus alone:100 (38,5%)
	Midbrain alone in 22 (7.8%)
	Both paramedian thalamus and midbrain in 86 patients (33.1%)
	Multiple sites in 52 (20%)
Variant of Thalamic Blood Supply	Type I: 17 (81%)
	Type IIa: 2 (9,5%)
	Type IIb: 1 (4,8%)
	Type III: 1 (4,8%)