JournalFire makes it easy to share and discuss journal articles. Learn more...
|
Igor Kagan
Network
Followed Articles
Activity Feed
- created an event in Decision and Awareness Group j-clubLogin or register to post commentsTuesday, November 13, 2012 - 5:00pmThe pulvinar regulates information transmission between cortical areas based on attention demands. Saalmann YB (2012) Science.
- created an event in Decision and Awareness Group j-clubMonday, February 20, 2012 - 4:30pm
First DAG j-club :)
Oculomotor integration in patients with a pulvinar lesion. Van der Stigchel S (2010) Neuropsychologia.Login or register to post commentsInteresting article, somewhat unexpected result: pulvinar lesions impaired ability to suppress glancing at contralesional pop-out (oddball) distractors. We would expect the opposite from our monkey pulvinar inactivation data. However, these patients did not exhibit extinction (like our monkeys), so that may be the reason. How about target and distractor in the same hemifield? - Igor Kagan (Caltech) February 20, 2012 Comment deleted - is following 1 new article in Decision and Awareness Group j-club: To DiscussOculomotor integration in patients with a pulvinar lesion. Van der Stigchel S (2010) Neuropsychologia.February 20, 2012Login or register to post comments
- is following 3 new articles in My PublicationsMotor preparatory activity in posterior parietal cortex is modulated by subjective absolute value. Iyer A (2010) PLoS Biol.Space representation for eye movements is more contralateral in monkeys than in humans. Kagan I (2010) Proc Natl Acad Sci U S A.Human posterior parietal cortex plans where to reach and what to avoid. Lindner A (2010) J Neurosci.February 20, 2012Login or register to post comments
- created the Decision and Awareness Group j-club journal club.February 20, 2012
- is following 1 new article in Andersen Lab @ Caltech j-club: LibraryUsing a Compound Gain Field to Compute a Reach Plan. Chang Steve W.C. (2009) Neuron.December 13, 2009Login or register to post comments
- is following 1 new article in Andersen Lab @ Caltech j-club: LibraryDirect Activation of Sparse, Distributed Populations of Cortical Neurons by Electrical Microstimulation. Histed Mark H. (2009) Neuron.November 17, 2009Login or register to post comments
- created the Andersen Lab @ Caltech j-club journal club.November 17, 2009
- is following 4 new articles in My PublicationsOrientation and direction selectivity of neurons in V1 of alert monkeys: functional relationships and laminar distributions. Gur M (2005) Cereb Cortex.Saccades and drifts differentially modulate neuronal activity in V1: Effects of retinal image motion, position, and extraretinal influences. Kagan Igor (2008) JOV.Spatial organization of receptive fields of V1 neurons of alert monkeys: comparison with responses to gratings. Kagan I (2002) J Neurophysiol.Selective activation of visual cortex neurons by fixational eye movements: implications for neural coding. Snodderly DM (2001) Vis Neurosci.November 12, 2009Login or register to post comments
- joined the Journalfire Discussion journal club.November 12, 2009
- Login or register to post comments
This article provides further support for fast dorsal stream / slow ventral stream ("framing" or "active black-boards") feedback theories, using CSD analysis.
It also adds important 'cortical layer' dimension to the analysis of latencies.Functional anatomy and interaction of fast and slow visual pathways in macaque monkeys. Chen CM (2007) Cereb Cortex. Tots More Socially Cognitive Than Apes
By LAURAN NEERGAARD – Sep 6, 2007
WASHINGTON (AP) — Toddlers may act up like little apes, but researchers who compared the species concluded a 2-year-old child still has the more sophisticated social learning skills.
In one test, preschoolers who wanted a toy hidden in a trick tube intently copied a scientist's movements to retrieve the prize. Chimps watched the lesson, but then mostly tried to smash or bite open the tube. When it came to simple math, however, the apes seemed to know more than the youngsters, apparently "adding" how many tasty raisins researchers had hidden.
In a novel study, scientists lured 106 chimpanzees, 32 orangutans and 105 toddlers to sit thro ... read more
Humans have evolved specialized skills of social cognition: the cultural intelligence hypothesis. Herrmann E (2007) Science.Login or register to post commentsThanks Igor. De Waal's observation is highly relevant here. It means that a conspecific dependent component of the knowledge transfer could certainly bias the assessment of social cognitive skills in favor of humans, which is a possible confound in the Tomasello study. Moreover, social rank dependency of cultural transfer has been observed in Japanese macaques: "A new case of fish-eating in Japanese macaques: implications for social constraints on the diffusion of feeding innovation." Leca JB, Gunst N, Watanabe K, Huffman MA Am J Primatol 2007, Vol 69, Issue 7, pp 821-8 - Zoltan Nadasdy (Caltech) September 30, 2007 Comment deletedTots More Socially Cognitive Than Apes
By LAURAN NEERGAARD – Sep 6, 2007
WASHINGTON (AP) — Toddlers may act up like little apes, but researchers who compared the species concluded a 2-year-old child still has the more sophisticated social learning skills.
In one test, preschoolers who wanted a toy hidden in a trick tube intently copied a scientist's movements to retrieve the prize. Chimps watched the lesson, but then mostly tried to smash or bite open the tube. When it came to simple math, however, the apes seemed to know more than the youngsters, apparently "adding" how many tasty raisins researchers had hidden.
In a novel study, scientists lured 106 chimpanzees, 32 orangutans and 105 toddlers to sit thro ... read more
Humans have evolved specialized skills of social cognition: the cultural intelligence hypothesis. Herrmann E (2007) Science.Login or register to post commentsThanks Igor. De Waal's observation is highly relevant here. It means that a conspecific dependent component of the knowledge transfer could certainly bias the assessment of social cognitive skills in favor of humans, which is a possible confound in the Tomasello study. Moreover, social rank dependency of cultural transfer has been observed in Japanese macaques: "A new case of fish-eating in Japanese macaques: implications for social constraints on the diffusion of feeding innovation." Leca JB, Gunst N, Watanabe K, Huffman MA Am J Primatol 2007, Vol 69, Issue 7, pp 821-8 - Zoltan Nadasdy (Caltech) September 30, 2007 Comment deletedIn my (humble) opinion, the conclusions of the study are heavily influenced by authors' (Tomasello and el.) a priory conceptual thinking. Tomasello has been previously advocating the "cultural intelligence" distinction between humans and animals. For example, Tomasello views accumulation of improvements/inventions through the generations as uniquely human (Tomasello 1999 "The Cultural Origins of Human Cognition"). Indeed, there are observations demonstrating that newly acquired knowledge is transferred
between generations in some animal species. I highly recommend Frans De Waal's book "The Ape and the Sushi Master" for many interesting facts and discussions on this and other related topics.In one of their previous ... read more
Humans have evolved specialized skills of social cognition: the cultural intelligence hypothesis. Herrmann E (2007) Science.Login or register to post commentsI agree, that the study was loaded. I would add with sarcasm, to support the importance of using a species-specific set of social interactions instead of the human specific ones, that dolphins, as highly social mammals, would also badly fail on these social tasks :) But seriously, not disputing that social interactions are species specific, I think Tomasello's goal in this study was to identify where apes are standing relative to humans on the scale designed for humans, to elucidate the evolutionary history of human cognitive capacities. I don't think that he is denying that apes have also evolved their specific repertoire of social skills during the last 6 million years. I think this is a fair bias. However, I totally agree that using conspecifics to demonstrate these task ... more - Zoltan Nadasdy (Caltech) September 26, 2007 Comment deleted- joined JournalFire!August 22, 2007