Object recognition
Visual and auditory gnosis
Also searched as Visual and auditory gnosis.
In depth
A subdomain of perceptual-motor function: recognizing objects, faces and sounds. Lost in agnosia after ventral-stream damage while reaching and grasping stay intact.
What drives it
Visual perception increases it.
the ventral stream plays a critical role in constructing our visual percepts, whereas the dorsal stream mediates the visual control of action, such as visually guided grasping. PMC4259122
Word & fact memory increases it.
object recognition/use (especially for low-frequency and/or low-familiarity items), as well as surface dyslexia and dysgraphia. Verbatim from the source for this edge — PMC6493106. PMID 21038218 · PMC6493106
What it drives
It increases Hand-eye coordination.
10.3389/fpsyg.2025.1452979 — The DSM-5 Neurocognitive Work Group agreed on six principal domains of cognitive function, each with subdomains. Perceptual-motor function comprises visual perception, visuoconstructional reasoning, perceptual-motor coordination, praxis and gnosis. Taxonomic edge, not a causal mechanism: this is a DSM-5 domain/subdomain relationship, not a pathway acting on another. Sachdev 2014, Nat Rev Neurol 10:634-642 — Classifying neurocognitive disorders: the DSM-5 approach. doi 10.1038/nrneurol.2014.181 The manual's own table, which carries praxis and gnosis, is reproduced as 'perceptual-motor praxis gnosis' in Table 1 of doi 10.1002/alz.12365 (Harmonizing neuropsychological assessment for mild neurocognitive disorders in Europe), mapped onto the DSM-5 domains. Scope stated before anyone asks: Sachdev's Figure 2 is an ABRIDGED rendering of the DSM-5 table and does not carry every subdomain named here, so the manual's own wording is cited beside it. doi 10.3389/fpsyg.2025.1452979
It increases Word & fact memory.
Visual agnosia is a deficit of object recognition addressed to the damage of the ventral stream (VS). The dorsal stream (DS) is usually intact in these patients, and it can be derived from well-preserved…. PMC11862234
Blends that modulate it
Each blend page names this pathway and carries the study behind its claim.
See it on the map
Open the causal map to follow this pathway upstream and downstream, arrow by arrow, each with its study.