Glossary Terms Flashcards
Apraxia
Inability to make sequence of movements
Alexia
Inability to read
Ataxia
Difficulty moving towards objects
Dorsal
Upwards/towards the top
Ventral
Downwards/towards the bottom
Caudal
Back/right
Rostral
Front/left
Medial
Towards the middle/centre
Lateral
Towards the outside
Anterior
Front
Posterior
Back
Monocular blindness (What is the visual deficit and where is the damage?)
Complete loss of vision in one eye
Injury to V1
Bitemporal hemianopia (What is the visual deficit and where is the damage?)
Loss of vision in both temporal visual fields (outer area)
Due to pressure on the medial part of chiasm (loss of vision on lateral side)
Right nasal hemianopia
Loss of vision in one nasal field (inner area)
Lesion in lateral chiasm
Homonymous hemianopia
Loss of vision to an entire visual field (may look like loss of vision in left side of each eye)
Complete cut to optic tract, lateral geniculate body or area V1
Quadrantanopia
Loss of vision in a complete quarter or half of the fovea
Visual cortex lesions
Macular Sparing
Central region of visual field remains intact while the rest is damaged
Unilateral lesions to visual cortex
Scotoma
Small blind spot
Small occipital lobe lesion
Infarct
Dead tissue
Apperceptive agnosia
Can perceive basic visual functions (acuity, colour, motion) but unable to recognize the object
Simultagnosia
Can’t perceive 2 objects at one time (if two objects are presented they only see one)
Associative agnosia
Can’t recognize an object even though they perceive it (can accurately copy drawing)
