Abstract

Mechanisms underlying direction-selectivity were studied in V1 of alert fixating macaque monkeys. Some direction-selective cells showed delayed asymmetric inhibition, some showed as shifting excitatory time-course across the receptive field, and some showed both. Both the direction of the spatial offset of the inhibition and the direction of the shift in excitatory response time-course correlated with the cells' preferred directionality. Part of the mechanism underlying a shifting response time-course may be delayed asymmetric inhibition. The data suggest that asymmetric inhibition is the major determinant for directionality in these cells, though both mechanisms could contribute. Based on this physiology, a simple, single-cell model is proposed, consistent with the known anatomy of some direction-selective cells in layer 6 (Meynert cells).

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Primate Research Center Grants (P51)
Project #
2P51RR000168-37
Application #
6277836
Study Section
Project Start
1998-05-01
Project End
1999-04-30
Budget Start
1997-10-01
Budget End
1998-09-30
Support Year
37
Fiscal Year
1998
Total Cost
Indirect Cost

  Institution

Name
Harvard University
Department
Type
DUNS #
082359691
City
Boston
State
MA
Country
United States
Zip Code
02115

  Publications

Duke, Angela N; Meng, Zhiqiang; Platt, Donna M et al. (2018) Evidence That Sedative Effects of Benzodiazepines Involve Unexpected GABAA Receptor Subtypes: Quantitative Observation Studies in Rhesus Monkeys. J Pharmacol Exp Ther 366:145-157
Kamberov, Yana G; Guhan, Samantha M; DeMarchis, Alessandra et al. (2018) Comparative evidence for the independent evolution of hair and sweat gland traits in primates. J Hum Evol 125:99-105
Seth, Nitin; Simmons, Heather A; Masood, Farah et al. (2018) Model of Traumatic Spinal Cord Injury for Evaluating Pharmacologic Treatments in Cynomolgus Macaques (Macaca fasicularis). Comp Med 68:63-73
Mauney, Sarah A; Woo, Tsung-Ung W; Sonntag, Kai C (2018) Cell Type-Specific Laser Capture Microdissection for Gene Expression Profiling in the Human Brain. Methods Mol Biol 1723:203-221
Shang, L; Smith, A J; Reilly, C S et al. (2018) Vaccine-modified NF-kB and GR signaling in cervicovaginal epithelium correlates with protection. Mucosal Immunol 11:512-522
Sonntag, Kai-Christian; Woo, Tsung-Ung W (2018) Laser microdissection and gene expression profiling in the human postmortem brain. Handb Clin Neurol 150:263-272
Almodovar, Sharilyn; Swanson, Jessica; Giavedoni, Luis D et al. (2018) Lung Vascular Remodeling, Cardiac Hypertrophy, and Inflammatory Cytokines in SHIVnef-Infected Macaques. Viral Immunol 31:206-222
Termini, James M; Church, Elizabeth S; Silver, Zachary A et al. (2017) Human Immunodeficiency Virus and Simian Immunodeficiency Virus Maintain High Levels of Infectivity in the Complete Absence of Mucin-Type O-Glycosylation. J Virol 91:
Ma, Qi; Ruan, Hongyu; Peng, Lisheng et al. (2017) Proteasome-independent polyubiquitin linkage regulates synapse scaffolding, efficacy, and plasticity. Proc Natl Acad Sci U S A 114:E8760-E8769
Shang, L; Duan, L; Perkey, K E et al. (2017) Epithelium-innate immune cell axis in mucosal responses to SIV. Mucosal Immunol 10:508-519

Showing the most recent 10 out of 365 publications