An additional five rhesus macaque monkeys that escaped from a South Carolina research facility last week have been recovered, meaning about a dozen of the rhesus macaque primates remain at large.

Police in a small South Carolina town are warning residents to keep their doors and windows locked after 43 monkeys escaped from a research facility.

An additional five rhesus macaque monkeys that escaped from a South Carolina research facility last week have been recovered, meaning about a dozen of the rhesus macaque primates remain at large.

Corey M. Ziemba
Oct 16, 2024; 44:e0349242024-e0349242024
Systems/Circuits

The visual world is richly adorned with texture, which can serve to delineate important elements of natural scenes. In anesthetized macaque monkeys, selectivity for the statistical features of natural texture is weak in V1, but substantial in V2, suggesting that neuronal activity in V2 might directly support texture perception. To test this, we investigated the relation between single cell activity in macaque V1 and V2 and simultaneously measured behavioral judgments of texture. We generated stimuli along a continuum between naturalistic texture and phase-randomized noise and trained two macaque monkeys to judge whether a sample texture more closely resembled one or the other extreme. Analysis of responses revealed that individual V1 and V2 neurons carried much less information about texture naturalness than behavioral reports. However, the sensitivity of V2 neurons, especially those preferring naturalistic textures, was significantly closer to that of behavior compared with V1. The firing of both V1 and V2 neurons predicted perceptual choices in response to repeated presentations of the same ambiguous stimulus in one monkey, despite low individual neural sensitivity. However, neither population predicted choice in the second monkey. We conclude that neural responses supporting texture perception likely continue to develop downstream of V2. Further, combined with neural data recorded while the same two monkeys performed an orientation discrimination task, our results demonstrate that choice-correlated neural activity in early sensory cortex is unstable across observers and tasks, untethered from neuronal sensitivity, and therefore unlikely to directly reflect the formation of perceptual decisions.

Once the first primate made a break, the 42 others followed suit in a simple case of monkey-see, monkey-do

The monkeys that science has experimented on for over a century

Title: Low-Cal Diets Kept Monkeys Healthier, But Didn't Lengthen Lives
Category: Health News
Created: 8/29/2012 4:05:00 PM
Last Editorial Review: 8/30/2012 12:00:00 AM

They pose no risk to human health, and they're living their best lives.

An experimental vaccine provided 100 percent protection against the mosquito-borne chikungunya virus in primates and mice, offering hope it will work for humans too, according to a study.

Long before dawn on a recent morning, Katie Milton and a group of stalwart volunteers, each armed with flashlight and compass, spread out into the jungle to take up positions at 35 listening stations marked on maps of the island.

The post Census reveals 1,200 howler monkeys living on Barro Colorado Island appeared first on Smithsonian Insider.

White-faced capuchin monkeys in Panama’s Coiba National Park habitually use hammer-and-anvil stones to break hermit crab shells, snail shells, coconuts and other food items, according […]

The post Scientists observe stone tool use by Cebus monkeys appeared first on Smithsonian Insider.

Unlike many humans, some monkeys are genuinely faithful to their mates.

Japanese researchers will release monkeys into the radioactive zone near Fukishima nuclear plant to test radiation levels. What could possibly go wrong?

The author wrote most of 'The Lorax' while visiting an ecosystem inhabited by orange, mustachioed patas monkeys.

The Cheese Monkeys is the coming of age story of a teen boy (who we only know by his nickname, “Happy”.) As he enters a midwest state school to study art in the late 50’s. First off, I’ll admit that I’m a fan of coming of age stories. All the good ones usually follow a protagonist who […]

"12 Monkeys" director Terry Gilliam and screenwriters David and Janet Peoples are not taking any credit for predicting a pandemic in their sci-fi classic starring Bruce Willis and Brad Pitt.

More Ozzy TV- Arctic Monkeys 'Four Out Of Five' Video, Muse Concert Film Preview, Cliff Burton Documentary, Sevendust, Free Volbeat Show and more

The only reason "we" are taking this as seriously as we have been (which, depending on the "we," means barely at all, but still) is because some relatively high on the social scale people got it early. Longtime readers remember how, years ago, I used to joke that we wouldn't take it seriously until it breached the NoVa virus defense wall. And then it did.

Capuchins are highly intelligent monkeys that live in the tropical forests of Central and South America. In the wild, they use tools to crack open nuts and crabs and have learned to rub crushed millipedes on their backs as mosquito repellant. Easily trained, they are historically recognizable as the classic organ-grinder's monkey and are today widely used in lab experiments and occasionally as service animals. What sorts of tasks are monkey helpers trained to perform to assist the disabled?

We return like a nerdy phoenix for episode 66, where Henry Burrell leads David Price and Dominic Preston down the tech rabbit hole to discuss the week's news. Amazon Prime Day came and went, but what does it really mean for consumers and the media? Did you buy anything? Did you need it? The team then discuss the odd ongoing story of the man who lost copyright of an image of a monkey to... the monkey that allegedly took it. PETA got involved. It's weird. It's good to be back.  

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MECP2 gain-of-function and loss-of-function in genetically engineered monkeys recapitulates typical phenotypes in patients with autism, yet where MECP2 mutation affects the monkey brain and whether/how it relates to autism pathology remain unknown. Here we report a combination of gene–circuit–behavior analyses including MECP2 coexpression network, locomotive and cognitive behaviors, and EEG and fMRI findings in 5 MECP2 overexpressed monkeys (Macaca fascicularis; 3 females) and 20 wild-type monkeys (Macaca fascicularis; 11 females). Whole-genome expression analysis revealed MECP2 coexpressed genes significantly enriched in GABA-related signaling pathways, whereby reduced β-synchronization within fronto-parieto-occipital networks was associated with abnormal locomotive behaviors. Meanwhile, MECP2-induced hyperconnectivity in prefrontal and cingulate networks accounted for regressive deficits in reversal learning tasks. Furthermore, we stratified a cohort of 49 patients with autism and 72 healthy controls of 1112 subjects using functional connectivity patterns, and identified dysconnectivity profiles similar to those in monkeys. By establishing a circuit-based construct link between genetically defined models and stratified patients, these results pave new avenues to deconstruct clinical heterogeneity and advance accurate diagnosis in psychiatric disorders.

SIGNIFICANCE STATEMENT Autism spectrum disorder (ASD) is a complex disorder with co-occurring symptoms caused by multiple genetic variations and brain circuit abnormalities. To dissect the gene–circuit–behavior causal chain underlying ASD, animal models are established by manipulating causative genes such as MECP2. However, it is unknown whether such models have captured any circuit-level pathology in ASD patients, as demonstrated by human brain imaging studies. Here, we use transgenic macaques to examine the causal effect of MECP2 overexpression on gene coexpression, brain circuits, and behaviors. For the first time, we demonstrate that the circuit abnormalities linked to MECP2 and autism-like traits in the monkeys can be mapped to a homogeneous ASD subgroup, thereby offering a new strategy to deconstruct clinical heterogeneity in ASD.

A CORONAVIRUS vaccine developed in China has been proven effective on monkeys. PiCoVacc, a vaccine made by Beijing-based Sinovac Biotech, used a typical method to prevent the virus from infecting life

Two lineages of ancient monkey migrated from Africa to South America more than 30 million years ago. But we’re not sure which ones got there first

Title: Stem Cells Used to Regenerate Heart Muscle in Monkeys
Category: Health News
Created: 4/30/2014 2:36:00 PM
Last Editorial Review: 5/1/2014 12:00:00 AM

Title: Antibody Shot Protects Monkeys From HIV-Like Infection
Category: Health News
Created: 4/27/2016 12:00:00 AM
Last Editorial Review: 4/28/2016 12:00:00 AM

Fossil teeth uncovered in Peru reveal that an extinct family of primates, thought to have lived only in Africa, made it across the ocean

The following is a brief roundup of the latest scientific studies on the novel coronavirus and efforts to find treatments and vaccines for COVID-19, the illness caused by the virus.

Prior to the discovery, fewer than 1,000 grey-shanked doucs were known to exist, making them one of the 25 most endangered primates on the planet.

Watch these beautiful Japanese macaques at Wild Snow Monkey Park who have truly mastered the fine art of relaxation.

If you dream of testing the limits of solar powered mobility, but don't have the DIY gene, here is someone who can help

Radu Banciu, 49, sparked outrage with the comment while hosting the late evening show on B1 TV. He said: 'Serena Williams looks exactly like one of those monkeys at the zoo with the red a****.'

The primates are normally well fed by tourists in Lopburi, central Thailand, but visitors have plummeted because of the COVID-19 virus which is gripping the world.

They brought this year’s T in the Park to a close on Sunday evening with a storming set a Balado airfield in Perthshire on Sunday evening – but behind the scenes controversy still raged over rock band Arctic Monkeys’ involvement in a controversial tax avoidance scheme.

A new trial is underway for a coronavirus vaccine is underway at Oxford University in the UK involving more than 6,000 participants that will be started by the end of next month

Researchers at the US National Institutes of Health tested an experimental antiviral drug, first created for Ebola, on 18 rhesus macaques.

Marie Nicole Pareja says the monkeys' tails are pointing upwards, meaning they were native to the Indus Valley in what is now Pakistan rather than North Africa or the Middle East.

They found almost 200 recurrent genetic mutations of the new coronavirus - SARS-CoV-2 - that show how it may be evolving as it spreads in people.

The 1995 sci-fi flick “12 Monkeys” is about to become a TV show. This worries Angry Nerd—movies-turned-TV-shows don’t have the best track record. Sure, “Fargo” turned out fine, but let’s not forget the short-lived tragedy “Ferris Bueller”…

Chinese scientists have claimed that they have successfully tested the country's first vaccine against Covid-19 on monkeys, which is a significant development in the race to find a cure for the virus. According to the reports, PiCoVacc, an inactivated Covid-19 vaccine candidate made by Beijing-based Sinovac Biotech, has shown promising results.

Govt to move High Court to seek lifting of a ban on killing monkeys.

Keane, John, 1949- author

China conducts 1st Covid vaccine test on monkeys