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Titolo:
The cortical connections of area V6: an occipito-parietal network processing visual information
Autore:
Galletti, C; Gamberini, M; Kutz, DF; Fattori, P; Luppino, G; Matelli, M;
Indirizzi:
Univ Bologna, Dipartimento Fisiol Umana & Gen, I-40127 Bologna, Italy UnivBologna Bologna Italy I-40127 l Umana & Gen, I-40127 Bologna, Italy Univ Parma, Ist Fisiol Umana, I-43100 Parma, Italy Univ Parma Parma Italy I-43100 a, Ist Fisiol Umana, I-43100 Parma, Italy
Titolo Testata:
EUROPEAN JOURNAL OF NEUROSCIENCE
fascicolo: 8, volume: 13, anno: 2001,
pagine: 1572 - 1588
SICI:
0953-816X(200104)13:8<1572:TCCOAV>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUPERIOR TEMPORAL SULCUS; VENTRAL INTRAPARIETAL AREA; MONKEY PRESTRIATE CORTEX; MACAQUE MONKEY; RHESUS-MONKEY; FUNCTIONAL-PROPERTIES; TOPOGRAPHIC ORGANIZATION; PARIETOOCCIPITAL SULCUS; VISUOTOPIC ORGANIZATION; RESPONSE PROPERTIES;
Keywords:
awake macaque monkey; dorsal visual stream; extrastriate visual cortex; visual topography; visuomotor integration;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Galletti, C Univ Bologna, Dipartimento Fisiol Umana & Gen, I-40127 Bologna, Italy Univ Bologna Bologna Italy I-40127 n, I-40127 Bologna, Italy
Citazione:
C. Galletti et al., "The cortical connections of area V6: an occipito-parietal network processing visual information", EUR J NEURO, 13(8), 2001, pp. 1572-1588

Abstract

The aim of this work was to study the cortical connections of area V6 by injecting neuronal tracers into different retinotopic representations of this area. To this purpose, we first functionally recognized V6 by recording from neurons of the parieto-occipital cortex in awake macaque monkeys. Penetrations with recording syringes were performed in the behaving animals in order to inject tracers exactly at the recording sites. The tracers were injected into the central or peripheral field representation of V6 in different hemispheres. Irrespective of whether injections were made in the centre or periphery, area V6 showed reciprocal connections with areas V1, V2, V3, V3A, V4T, the middle temporal L-1/area V5 (MT/V5), the medial superior temporal area L-2 (MST), the medial intraparietal area (MIP), the ventral intraparietal area L-3 (VIP), the ventral part of the lateral intraparietal area L-4 (LIPV) and the ventral part of area V6A L-5 (VGA(V)). No labelled cellsor terminals were found in the inferior temporal, mesial and frontal cortices. The connections of V6 with V1, and with all the retinotopically organized prestriate areas, were organized retinotopically. The connection of V6 with MIP suggests a visuotopic organization for this latter. Labelling in V6A and VIP after either central or peripheral V6 injections was very similar in location and extent, as expected on the basis of the nonretinotopic organization of these areas. We suggest that V6 plays a pivotal role in the dorsal visual stream, by distributing the visual information coming from theoccipital lobe to the sensorimotor areas of the parietal cortex. Given thefunctional characteristics of the cells of this network, we suggest that it could perform the fast form and motion analyses needed for the visual guiding of arm movements as well as their coordination with the eyes and the head.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 13:15:25