Abstract
The presence and degree of category-selective responses in the human brain remains a central research question in visual neuroscience. Evidence for category-selectivity in higher-level vision stems from neuroimaging studies of healthy participants, and converging evidence in patients after brain injury. However, the neuropsychological literature often focuses on either in-depth analysis of single case-studies or behavioural testing of one category, for example faces or words.
Here we adopt a novel approach to studying higher-level vision after brain injury by exploring the largest sample of posterior cerebral artery stroke patients currently available (n = 64). Patients were tested using an in-depth behavioural battery encompassing both low-level visual tests and higher-level visual tests of word, object, and face processing.
A data-driven approach (principal component analysis) was used to establish a pattern of co-occurrence within higher-level vision. The data revealed two principal components underlying patients’ performance. The first component included tests with a non-verbal (picture) input, including face and object processing. The second component included tests with a verbal (written word) input/output. Using a data-driven approach to study higher-level vision after brain injury suggests that patient’s behavioural performance does not reflect strict category-selective responses.
Here we adopt a novel approach to studying higher-level vision after brain injury by exploring the largest sample of posterior cerebral artery stroke patients currently available (n = 64). Patients were tested using an in-depth behavioural battery encompassing both low-level visual tests and higher-level visual tests of word, object, and face processing.
A data-driven approach (principal component analysis) was used to establish a pattern of co-occurrence within higher-level vision. The data revealed two principal components underlying patients’ performance. The first component included tests with a non-verbal (picture) input, including face and object processing. The second component included tests with a verbal (written word) input/output. Using a data-driven approach to study higher-level vision after brain injury suggests that patient’s behavioural performance does not reflect strict category-selective responses.
| Original language | English |
|---|---|
| Journal | Perception |
| Volume | 48 |
| Issue number | 2 |
| ISSN | 0301-0066 |
| DOIs | |
| Publication status | Published - 2019 |
| Event | European Conference on Visual Perception - Leuven, Belgium Duration: 25 Aug 2019 → 29 Aug 2019 Conference number: 42 https://kuleuvencongres.be/ecvp2019 |
Conference
| Conference | European Conference on Visual Perception |
|---|---|
| Number | 42 |
| Country/Territory | Belgium |
| City | Leuven |
| Period | 25/08/2019 → 29/08/2019 |
| Internet address |
