A tale of two agnosias: distinctions between form and integrative agnosia.
The performance of two patients with visual agnosia was compared across a number of tests examining visual processing. The patients were distinguished by having dorsal and medial ventral extrastriate lesions. While inanimate objects were disadvantaged for the patient with a dorsal extrastriate lesio...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2008
|
| _version_ | 1826264801300447232 |
|---|---|
| author | Riddoch, M Humphreys, G Akhtar, N Allen, H Bracewell, R Schofield, A |
| author_facet | Riddoch, M Humphreys, G Akhtar, N Allen, H Bracewell, R Schofield, A |
| author_sort | Riddoch, M |
| collection | OXFORD |
| description | The performance of two patients with visual agnosia was compared across a number of tests examining visual processing. The patients were distinguished by having dorsal and medial ventral extrastriate lesions. While inanimate objects were disadvantaged for the patient with a dorsal extrastriate lesion, animate items are disadvantaged for the patient with the medial ventral extrastriate lesion. The patients also showed contrasting patterns of performance on the Navon Test: The patient with a dorsal extrastriate lesion demonstrated a local bias while the patient with a medial ventral extrastriate lesion had a global bias. We propose that the dorsal and medial ventral visual pathways may be characterized at an extrastriate level by differences in local relative to more global visual processing and that this can link to visually based category-specific deficits in processing. |
| first_indexed | 2024-03-06T20:13:41Z |
| format | Journal article |
| id | oxford-uuid:2b6d1d09-c297-4023-8d69-7766b5586559 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:13:41Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:2b6d1d09-c297-4023-8d69-7766b55865592022-03-26T12:30:52ZA tale of two agnosias: distinctions between form and integrative agnosia.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:2b6d1d09-c297-4023-8d69-7766b5586559EnglishSymplectic Elements at Oxford2008Riddoch, MHumphreys, GAkhtar, NAllen, HBracewell, RSchofield, AThe performance of two patients with visual agnosia was compared across a number of tests examining visual processing. The patients were distinguished by having dorsal and medial ventral extrastriate lesions. While inanimate objects were disadvantaged for the patient with a dorsal extrastriate lesion, animate items are disadvantaged for the patient with the medial ventral extrastriate lesion. The patients also showed contrasting patterns of performance on the Navon Test: The patient with a dorsal extrastriate lesion demonstrated a local bias while the patient with a medial ventral extrastriate lesion had a global bias. We propose that the dorsal and medial ventral visual pathways may be characterized at an extrastriate level by differences in local relative to more global visual processing and that this can link to visually based category-specific deficits in processing. |
| spellingShingle | Riddoch, M Humphreys, G Akhtar, N Allen, H Bracewell, R Schofield, A A tale of two agnosias: distinctions between form and integrative agnosia. |
| title | A tale of two agnosias: distinctions between form and integrative agnosia. |
| title_full | A tale of two agnosias: distinctions between form and integrative agnosia. |
| title_fullStr | A tale of two agnosias: distinctions between form and integrative agnosia. |
| title_full_unstemmed | A tale of two agnosias: distinctions between form and integrative agnosia. |
| title_short | A tale of two agnosias: distinctions between form and integrative agnosia. |
| title_sort | tale of two agnosias distinctions between form and integrative agnosia |
| work_keys_str_mv | AT riddochm ataleoftwoagnosiasdistinctionsbetweenformandintegrativeagnosia AT humphreysg ataleoftwoagnosiasdistinctionsbetweenformandintegrativeagnosia AT akhtarn ataleoftwoagnosiasdistinctionsbetweenformandintegrativeagnosia AT allenh ataleoftwoagnosiasdistinctionsbetweenformandintegrativeagnosia AT bracewellr ataleoftwoagnosiasdistinctionsbetweenformandintegrativeagnosia AT schofielda ataleoftwoagnosiasdistinctionsbetweenformandintegrativeagnosia AT riddochm taleoftwoagnosiasdistinctionsbetweenformandintegrativeagnosia AT humphreysg taleoftwoagnosiasdistinctionsbetweenformandintegrativeagnosia AT akhtarn taleoftwoagnosiasdistinctionsbetweenformandintegrativeagnosia AT allenh taleoftwoagnosiasdistinctionsbetweenformandintegrativeagnosia AT bracewellr taleoftwoagnosiasdistinctionsbetweenformandintegrativeagnosia AT schofielda taleoftwoagnosiasdistinctionsbetweenformandintegrativeagnosia |