Tag: rapid visual categorization

Kreiman Lab News

Neural Networks and the Ventral Stream

Post author By gabriel kreiman
Post date November 3, 2020

Tue Nov 3, 2020 and Th Nov 5th, 2020. 11am-12:30pm.

9.520/6.860: STATISTICAL LEARNING THEORY AND APPLICATIONS

Thomas Serre, Gabriel Kreiman and Tomaso Poggio

Serre et al 2007 — HMAX, a biologically-inspired model of computations along the ventral visual stream

Tags computational models of vision, computational neuroscience, HMAX, MIT 6.860, MIT 9.520, rapid visual categorization, ventral visual cortex, visual object recognition

	October 2021
Mon	Tue	Wed	Thu	Fri	Sat	Sun
				1	2	3
4	5	6	7	8	9	10
11	12 CBS Seminar: Forgett… CBS Seminar: Forgetting Generates a Novel State That Is Reactivatable October 12, 2021 4:00 pm - 5:00 pm CBS Seminars this coming Tuesday 10/12 at Noon with our own Yun Zhang speaking about new work: Forgetting Generates a Novel State That Is Reactivatable. We are excited that we will see everyone soon! We will use a hybrid format. If you are part of the on-campus Harvard community, we invite you to put on your mask and attend in person in the large lecture hall Northwest B103. If you prefer to join via Zoom, that will work, too. We will take questions from both groups. See more details CBMM Seminar: Kojiti… CBMM Seminar: Kojitij Kar, Reversible chemogenetic modulation of macaque v4 neurons October 12, 2021 8:00 pm - 9:00 pm Title: Probing the mechanisms of visual object recognition with reversible chemogenetic modulation of macaque V4 neurons Speaker/s: Dr. Kohitij Kar, DiCarlo Lab, MIT Date/Time: October 12, 2021, 4:00 pm to 5:30 pm ET Link to RSVP for post meeting social: https://forms.gle/bdUY4DxF3dTmFq3x6 Abstract: We can computationally approximate a visual object's identity from the distributed neural activity patterns across a series of hierarchically connected brain areas (e.g., V4, IT) in the primate ventral stream. However, testing whether these circuits indeed play a causal role requires targeted neural perturbation strategies that enable discrimination amongst competing models. Here we probed the role of macaque V4 and its primary feedforward target, the inferior temporal (IT) cortex, during object recognition. We combined DREADDs-based chemogenetic inhibition of V4 neurons with large-scale electrophysiology in V4 and IT while simultaneously measuring the monkeys' image-by-image object recognition behavior. Our results provide causal evidence linking the ventral stream hierarchy with core object recognition behavior. Also, in addition, to providing a “yes” vs. “no” answer to the involvement of a brain area in a behavior, we demonstrate how our approach allows us to use direct causal perturbation data to discriminate amongst competing mechanistic brain models. See more details • •	13 Kreiman Lab Meeting … Kreiman Lab Meeting -- Will Xiao October 13, 2021 4:00 pm - 6:00 pm Dr Gabriel Kreiman is inviting you to a scheduled Zoom meeting. Topic: KLAB lab meeting Time: Oct 14, 2020 12:00 PM Eastern Time (US and Canada) Every week on Wed, until Nov 4, 2020, 4 occurrence(s) Oct 14, 2020 12:00 PM Oct 21, 2020 12:00 PM Oct 28, 2020 12:00 PM Nov 4, 2020 12:00 PM See more details •	14	15 Harvard Brain Initia… Harvard Brain Initiative Fall Networking Event October 15, 2021 8:30 pm - 9:30 pm The gNeuro organizers are excited to invite you to an in-person Fall Networking event at 4:30pm on Friday the 15th of October on the HMS quad. Featuring warm apple cider and fall-themed snacks. See more details •	16	17
18 KLAB Journal Club: T… KLAB Journal Club: Trenton Bricken October 18, 2021 4:00 pm - 5:00 pm See more details •	19 CBMM Meeting Module … CBMM Meeting Module 2 October 19, 2021 8:00 pm - 10:00 pm See more details •	20 Kreiman Lab Meeting Kreiman Lab Meeting October 20, 2021 4:00 pm - 6:00 pm Dr Gabriel Kreiman is inviting you to a scheduled Zoom meeting. Topic: KLAB lab meeting Time: Oct 14, 2020 12:00 PM Eastern Time (US and Canada) Every week on Wed, until Nov 4, 2020, 4 occurrence(s) Oct 14, 2020 12:00 PM Oct 21, 2020 12:00 PM Oct 28, 2020 12:00 PM Nov 4, 2020 12:00 PM See more details MBB Faculty + Gradua… MBB Faculty + Graduate students get together October 20, 2021 5:30 pm - 6:30 pm Robinson Hall Courtyard Wednesday, October 20 at 1:30 PM to meet faculty and grad students over apple cider, coffee, donuts, and other Fall snacks. The event will be held at the Sever/Robinson Hall Courtyard. Please RSVP here or by scanning the QR code on the flyer. RSVP required. See more details • •	21	22	23	24
25	26 CBMM Meeting Module … CBMM Meeting Module 2 October 26, 2021 8:00 pm - 10:00 pm See more details •	27 Kreiman Lab Meeting … Kreiman Lab Meeting -- Joint meeting with Smirnakis lab October 27, 2021 4:00 pm - 6:00 pm Dr Gabriel Kreiman is inviting you to a scheduled Zoom meeting. Topic: KLAB lab meeting Time: Oct 14, 2020 12:00 PM Eastern Time (US and Canada) Every week on Wed, until Nov 4, 2020, 4 occurrence(s) Oct 14, 2020 12:00 PM Oct 21, 2020 12:00 PM Oct 28, 2020 12:00 PM Nov 4, 2020 12:00 PM See more details •	28	29	30	31