Case Studies in the Neuropsychology of Vision

by Humphreys,Glyn W.

• ISBN13: 9780863778957
• ISBN10: 086377895X
• Edition: 1st
• Format: Hardcover
• Copyright: 1999-11-01
• Publisher: Psychology Pres

Summary

Within the field of vision, case studies of patients with selective deficits have helped develop our understanding of how basic properties of images are processed (color, motion), how such properties are integrated into perception, and how perceptual processes relate to recognition and imagery. This book provides reviews of major case studies dealing with the breakdown of visual perception and recognition. The case studies are discussed in the light of subsequent studies and the chapters provide a context in which the contributions of the case studies can be evaluated. Disorders of motion vision, color vision, perceptual integration, perceptual classification, recognition of particular categories of object, semantic access from vision (in optic aphasia), and recognition impairments with relative sparing of imagery are covered.

Table of Contents

List of contributors	ix
General background	xi
Motion blindness	1	(16)
C.A. Heywood
J. Zihl
Introduction	1	(2)
The case of L.M.	3	(1)
Behavioural consequences of L.M.'s movement vision disorder	4	(2)
Neuropsychological assessment	6	(2)
Cerebral akinetopsia	8	(6)
Conclusions	14	(1)
References	14	(3)
Cerebral achromatopsia	17	(24)
C.A. Heywood
A. Cowey
Introduction	17	(3)
Cerebral achromatopsia	20	(2)
A single case study	22	(12)
Inferior temporal cortex	34	(2)
Form processing in achromatopsia	36	(1)
Conclusions	36	(1)
References	37	(4)
Integrative agnosia	41	(18)
Glyn W. Humphreys
Historical background	41	(2)
Defining integrative agnosia	43	(4)
Analyses using visual search	47	(2)
Encoding wholes and parts	49	(2)
Agnosia and simultanagnosia	51	(1)
Long-term visual memory	52	(1)
Agnosia 16 years on	53	(1)
Relations to other patients	53	(2)
Conclusions	55	(1)
Acknowledgements	55	(1)
References	55	(4)
Apperceptive agnosia: A deficit of perceptual categorisation of objects	59	(22)
Jules Davidoff
Elizabeth K. Warrington
Historical background	59	(4)
Case studies in Warrington & James (1988)	63	(8)
Issues of representation	71	(4)
Unresolved problems	75	(2)
References	77	(4)
Vision and visual mental imagery	81	(30)
Marlene Behrmann
Morris Moscovitch
Gordon Winocur
Common systems for perception and imagery	84	(2)
Evidence for dissociations between perception and imagery	86	(2)
A case report of a patient with intact imagery and visual agnosia	88	(9)
Consistent evidence from other patients	97	(1)
Discussion and conclusion	98	(7)
Concluding remarks	105	(1)
Acknowledgements	105	(1)
References	105	(6)
Category-specific recognition impairments for living and nonliving things	111	(22)
Emer M.E. Forde
Modern case studies of category-specific recognition impairments	113	(4)
Category-specific recognition impairments: An artifactual finding?	117	(2)
Category-specific recognition impairments: A return to the idea that these might reflect damage to a categorically organised knowledge system	119	(2)
Category-specific recognition impairments: The importance of category structure	121	(3)
Summary to date	124	(4)
Category-specific impairments for nonliving things	128	(2)
References	130	(3)
Optic aphasia: A review of some classic cases	133	(28)
M. Jane Riddoch
Introduction	133	(2)
Lhermitte and Beauvois' (1973) disconnection account of optic aphasia	135	(1)
Re-evaluation by Beauvois (1982) of her original account: Disconnection according to modality	136	(3)
Are visual semantics intact in optic aphasia? Disconnection within modality	139	(7)
The direct route to naming account	146	(2)
The right hemisphere hypothesis: An anatomical disconnection	148	(3)
Superadditive effects of two or more mild deficits	151	(2)
Gesturing ability as an indicator of visual recognition	153	(3)
Summary to date	156	(1)
A coda	157	(1)
Acknowledgements	158	(1)
References	158	(3)
Covert recognition and anosognosia in prosopagnosic patients	161	(20)
Edward H.F. De Haan
Acknowledgements	177	(1)
References	177	(4)
Relations among the agnosias	181	(20)
Martha J. Farah
Taxonomies of visual agnosia	182	(3)
Appreceptive agnosia	185	(4)
Associative agnosia	189	(3)
Subtypes of associative agnosia	192	(5)
Acknowledgements	197	(1)
References	197	(4)
Author index	201	(8)
Subject index	209