{
  "id": 18584426,
  "title": "Broad Cognitive and Motivational Enhancement through M4-Selective Muscarinic Modulation",
  "url": "https://urgent.news/2026/11/06/broad-cognitive-and-motivational-enhancement-through-m4-selective",
  "topic": "science",
  "section": "Science",
  "published": "2026-11-06T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.11.05.764685v1?rss=1"
  },
  "original_language": "en",
  "account": "Recent research has explored the potential of selectively targeting the muscarinic M4 receptor subtype to enhance cognitive and motivational abilities. This particular receptor is known to be targeted by compounds used in treating schizophrenia and Alzheimer's disease, but the effects of M4-subtype selective modulation on cognition and motivation remain largely unexplored due to dose-limiting side effects, limited receptor-selective compounds, and the need for multi-domain assessments of cognition. To overcome these challenges, researchers employed a M4-selective positive allosteric modulator (PAM) to evaluate a wide range of endpoints in nonhuman primates, focusing on motivational effort control and various executive function domains.\n\nThe study revealed dose-dependent improvements in several cognitive tasks, including set shifting, which measures cognitive flexibility; visual search, indicating selective attention; antisaccade performance, reflecting inhibitory control; visuospatial maze learning; and temporal order serial object learning. Importantly, working memory span was not systematically modulated by the M4 PAM. Furthermore, the modulator reduced effort avoidance in an effort-based choice task, demonstrating a pro-motivational effect.\n\nThe researchers analyzed task-composite performance scores, which showed pro-cognitive effects across multiple doses and identified an effective dose range for individual subjects, all without the occurrence of adverse dose-limiting cholinergic side effects. These findings suggest that the M4 receptor plays a crucial role in regulating executive cognitive functioning. The M4 receptor may be acting on domain-general neural processes spanning the prefrontal-striatal circuits, potentially making it a master regulator of executive cognitive functioning.",
  "summary": "The muscarinic M4 subtype of acetylcholine receptors is part of agonist compounds considered treatment options for Schizophrenia and Alzheimers disease, but how M4-subtype selective modulation affects cognition and motivation is largely unknown due to dose-limiting side effects, a scarcity of receptor-selective compounds, and missing multi-domain assessments of cognition. Here, we surmount these…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}