Stroke patients often have decreased awareness of their weaker side. This can manifest in different ways such as not turning the head toward the weaker side, forgetting to put the weaker arm or leg in clothing, and not noticing objects or people approaching the weak side. Left side neglect tends to be more severe than right side neglect.

https://www.stroke-rehab.com/effects-of-stroke.html

The NIHSS is a 15-item neurological examination stroke scale used to evaluate the effect of acute cerebral infarction on the levels of consciousness, language, neglect, visual-field loss, extraocular movement, motor strength, ataxia, dysarthria, and sensory loss.

Ratings for each item are scored on a 3- to 5-point scale, with 0 as normal, and there is an allowance for untestable items. Scores range from 0 to 42, with higher scores indicating greater severity.

https://www.physio-pedia.com/NIH_Stroke_Scale#cite_note-:0-1