TY - JOUR

T1 - Definition: Orientation agnosia

AU - Beschin, Nicoletta

AU - Turnbull, Oliver

PY - 2024/3/29

Y1 - 2024/3/29

N2 - Orientation agnosia (OA) defines the difficulty of correctlyreproducing, describing and recognizing the spatial orientation(typically the correct cardinal axis) of visually presentedobjects. The orientation difficulty is independent of the originalorientation of the object (vertical or horizontal), and hasbeen reported for drawings of real objects (like a house or akangaroo), and for meaningless stimuli (such as the ReyComplex Figure). The term orientation agnosia is used only forsubstantial (and ideally repeatable) misorientations, of whichdramatic rotations of 90 or 180 have often been reported.Object orientation can be assessed in several ways: examplesinclude copying an image directly, drawing a picturefrom memory, verbally describing the object's orientation, orchoosing the stimulus orientation from among alternatives.Thus, while the phenomenon has been described as ‘rotateddrawing’, it also appears when assessed using methods otherthan drawing.Orientation agnosia is a selective disorder that dissociatesfrom constructional apraxia and visual object agnosia. Thus,despite substantial orientation errors, patients are able toaccurately reproduce and name visually presented objects,suggesting that the processing of shape information is moreintact.The label “Orientation agnosia” applies only when theorientation errors cannot be attributed to aphasia, sensorymotorimpairments, intelligence deficits or any other disordersthat could prevent task completion.

AB - Orientation agnosia (OA) defines the difficulty of correctlyreproducing, describing and recognizing the spatial orientation(typically the correct cardinal axis) of visually presentedobjects. The orientation difficulty is independent of the originalorientation of the object (vertical or horizontal), and hasbeen reported for drawings of real objects (like a house or akangaroo), and for meaningless stimuli (such as the ReyComplex Figure). The term orientation agnosia is used only forsubstantial (and ideally repeatable) misorientations, of whichdramatic rotations of 90 or 180 have often been reported.Object orientation can be assessed in several ways: examplesinclude copying an image directly, drawing a picturefrom memory, verbally describing the object's orientation, orchoosing the stimulus orientation from among alternatives.Thus, while the phenomenon has been described as ‘rotateddrawing’, it also appears when assessed using methods otherthan drawing.Orientation agnosia is a selective disorder that dissociatesfrom constructional apraxia and visual object agnosia. Thus,despite substantial orientation errors, patients are able toaccurately reproduce and name visually presented objects,suggesting that the processing of shape information is moreintact.The label “Orientation agnosia” applies only when theorientation errors cannot be attributed to aphasia, sensorymotorimpairments, intelligence deficits or any other disordersthat could prevent task completion.

U2 - 10.1016/j.cortex.2024.03.006

DO - 10.1016/j.cortex.2024.03.006

M3 - Article

JO - Cortex

JF - Cortex

SN - 0010-9452

ER -