Article
Neurosciences
Grace F. DiRisio, Yongsoo Ra, Yinghui Qiu, Akiyuki Anzai, Gregory C. DeAngelis
Summary: Smooth eye movements are essential for natural visual processes, and they can be guided by both visual cues and extraretinal signals. This study focuses on how the brain processes and integrates these signals during smooth pursuit eye movements. The researchers investigate the responses of neurons in the MSTd area of rhesus monkeys and find that most neurons have preferences for the direction of eye rotation based on both visual and extraretinal signals. This suggests that area MSTd plays a crucial role in integrating these signals and representing the velocity of smooth eye movements.
JOURNAL OF NEUROSCIENCE
(2023)
Review
Neurosciences
Sophie K. Scott, Kyle Jasmin
Summary: This paper discusses the processing of sound in primate brains, proposing a general auditory processing framework that is supported by recent research findings.
FRONTIERS IN NEUROSCIENCE
(2022)
Article
Cell Biology
Qihao Zheng, Luxin Zhou, Yong Gu
Summary: The study investigates the integration of optic flow and vestibular cues in precise heading perception, finding that adjusting visual stimuli to lead vestibular cues can improve heading performance. This alignment is associated with nonlinear gain modulation effects, facilitating cue integration in certain brain areas.
Article
Multidisciplinary Sciences
Nadege Sarrazin, Estelle Chavret-Reculon, Corinne Bachelin, Mehdi Felfli, Rafik Arab, Sophie Gilardeau, Elena Brazhnikova, Elisabeth Dubus, Lydia Yaha-Cherif, Jean Lorenceau, Serge Picaud, Serge Rosolen, Pierre Moissonnier, Pierre Pouget, Anne Baron-Van Evercooren
Summary: This study focuses on the long-term effects of toxin-induced demyelination of the macaque optic nerve and its impact on remyelination, axon preservation, and visual functions. The findings reveal visual impairment, including damage to the optic nerve and retina. This nonhuman primate model replicates key features of multiple sclerosis lesions, making it valuable for studying new therapeutic approaches.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Environmental Sciences
Milena Raffi, Aurelio Trofe, Andrea Meoni, Luca Gallelli, Alessandro Piras
Summary: Microsaccadic activity is modulated by the speed of optic flow stimuli and the stimulated retinal regions, particularly the peripheral retina.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Environmental Sciences
Milena Raffi, Aurelio Trofe, Monica Perazzolo, Andrea Meoni, Alessandro Piras
Summary: The study found that microsaccadic characteristics, such as duration, peak velocity, and rate, were significantly modulated by optic flow stimuli and trial sequence. In standing conditions, microsaccades showed non-uniform directions in the upper-left quadrant of the visual field, while in sitting conditions, the directions were uniform. Additionally, microsaccade rate increased from trial 1 to trial 5 in all conditions.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2021)
Article
Neurosciences
Megan Roussy, Benjamin Corrigan, Rogelio Luna, Roberto A. Gulli, Adam J. Sachs, Lena Palaniyappan, Julio C. Martinez-Trujilio
Summary: The study found that LPFC neurons maintain robust and distinct neural codes for mnemonic and perceptual visuospatial representations during naturalistic vision, with animals using different behavioral strategies for working memory and perception tasks.
JOURNAL OF NEUROSCIENCE
(2022)
Article
Clinical Neurology
Sinem Balta Beylergil, Angela M. Noecker, Mikkel Petersen, Palak Gupta, Sarah Ozinga, Mark F. Walker, Camilla Kilbane, Cameron C. McIntyre, Aasef G. Shaikh
Summary: The study revealed that patients with Parkinson's disease showed lower accuracy in vestibular perception compared to healthy controls, but significant improvement was observed after deep brain stimulation treatment. However, there were no significant differences in visual heading perception between patients and controls.
JOURNAL OF NEUROLOGY
(2022)
Article
Chemistry, Multidisciplinary
Yixin Tian, Jiapeng Yin, Chengyao Wang, Zhenliang He, Jingyi Xie, Xiaoshan Feng, Yang Zhou, Tianyu Ma, Yang Xie, Xue Li, Tianming Yang, Chi Ren, Chengyu Li, Zhengtuo Zhao
Summary: Researchers have developed a mechanically robust ultraflexible electrode array, the MERF, for high-density, large-scale, and chronic recording of neurons in the nonhuman primate brain. The MERF array has shown promising results in basic neuroscience studies and brain-machine interface applications.
Article
Multidisciplinary Sciences
Gaoyuan Ma, Katrina H. Worthy, Cirong Liu, Marcello G. P. Rosa, Nafiseh Atapour
Summary: PV immunohistochemistry accurately traces the optic radiation pathway in the marmoset monkey visual cortex. The trajectory revealed by PV staining matches the results of high-resolution diffusion tensor imaging. PV-labeled fibers exclusively target the primary visual cortex without feeding into other visual areas. PV staining can be used to assess the progress of degenerative brain diseases.
Article
Cell Biology
Tomaso Muzzu, Aman B. Saleem
Summary: This article is a commentary on the response written by Vasilevskaya et al., 2023, published concurrently in Cell Reports, for our recent article "Feature selectivity can explain mismatch signals in mouse visual cortex." We found that the results in the response supported many of our findings, and with their new results, we argue for the need to redefine sensorimotor mismatch selectivity in the mouse visual system.
Article
Biology
Spencer Chin-Yu Chen, Giacomo Benvenuti, Yuzhi Chen, Satwant Kumar, Charu Ramakrishnan, Karl Deisseroth, Wilson S. Geisler, Eyal Seidemann
Summary: The study investigates whether direct stimulation of primate V1 can substitute for a visual stimulus and mimic its perceptual effect. The researchers developed an optical-genetic toolkit to 'read' and 'write' neural population responses in behaving macaques. The results show that low-power optogenetic stimulation in V1 can mimic the visual masking effect, and there is a sublinear interaction between visual and optogenetic-evoked V1 responses that accounts for this effect. These findings provide further insights into perceptual substitutions by direct stimulation of sensory cortex.
Review
Anatomy & Morphology
Jessica Taubert, J. Brendan Ritchie, Leslie G. Ungerleider, Christopher I. Baker
Summary: Faces and bodies are often processed as distinct categories in the primate visual system, with separate brain regions dedicated to each. However, they are part of the same object and tend to covary in naturalistic settings. The current evidence, especially in humans, does not provide a clear answer on how the representation of faces and bodies is organized in the cortex.
BRAIN STRUCTURE & FUNCTION
(2022)
Review
Neurosciences
Benedict Wild, Stefan Treue
Summary: The medial superior temporal cortex (MST) in the primate visual cortex plays a crucial role in motion perception and is involved in smooth pursuit eye movements, attention, and working memory. It is considered a gateway connecting perception, cognition, and action planning in the visual system.
JOURNAL OF NEUROPHYSIOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Anthony Bigelow, Taekjun Kim, Tomoyuki Namima, Wyeth Bair, Anitha Pasupathy
Summary: There is a paradox in our understanding of motion processing in the primate visual system. Neurons in the dorsal motion processing stream often fail to encode long-range and perceptually salient jumps of a moving stimulus. However, ventral visual area V4 includes neurons that maintain direction selectivity for long-range motion, even in the presence of conflicting local motion. These V4 neurons exhibit specific selectivity for motion of objects and can accurately decode motion direction using just a few neurons.
