--- title: "Mental Overload – What Happens in the Brain | Brain Model" description: "The neuroanatomy of mental overload – when working memory and prefrontal capacity reach their limits. dlPFC, ACC and thalamus in concert." canonical: https://www.brainmodel.digital/understand-the-brain/mental-overload/ parent: https://www.brainmodel.digital/understand-the-brain/ author: Johannes Faupel site: brainmodel.digital — Anatomically interactive. Scientifically precise. No therapeutic school. license: Citation welcome with attribution and a link to the canonical URL. type: educational — healthy-brain function, not diagnosis or therapy --- > **Canonical page (cite this):** [Map 39 – Mental Overload](https://www.brainmodel.digital/understand-the-brain/mental-overload/) # Map 39 – Mental Overload What happens in the brain when working memory overflows and the head feels full ## Anatomically and biochemically The feeling of a "full head" is a precise neurobiological state: the working memory of the **dorsolateral prefrontal cortex (dlPFC)** has a limited capacity. On average it holds 4 ± 1 information units simultaneously active. When too many open topics – unfinished tasks, pending decisions, ongoing conversations, plans – must be held active at the same time, working memory exceeds its capacity. Newly incoming information can no longer be cleanly processed. The **thalamus** loses its prioritisation ability when too many channels are open simultaneously. The **anterior cingulate cortex (ACC)** signals the overload as a conflict. The **anterior insula** delivers the physical mental overload feeling: pressure behind the forehead, tightness, the immediate need to put everything down. The **hippocampus** is meant to supply material for current tasks – but retrieval slows when all the dlPFC's processing channels are occupied. Why does pushing on make mental overload worse rather than resolving it? Because working memory has no way to empty units while new ones keep arriving. The capacity limit is neurobiologically fixed. Why does writing things down provide relief so quickly? Because externalising topics onto paper signals to the ACC: this loop is noted. Working memory no longer needs to hold it actively. The dlPFC regains capacity. ## Examples from everyday life - **A conversation while three tasks are still active:** Working memory tries to hold all four things simultaneously. Retrieval for the conversation slows. - **Forgetting names:** When working memory is full, newly incoming names are not cleanly encoded. Not a failure – a capacity issue. - **The urge to put everything down:** The insula signal is real: the brain is signalling that it needs relief. - **Writing things down brings immediate relief:** The ACC receives a closure for the written-down loop. Working memory can release it. - **End of a full day:** The feeling in the evening of being unable to absorb anything more: the dlPFC has depleted its daily buffer. ## What this card does not say This card describes a normal mechanism in the healthy human brain. A "full head" is a capacity signal, not a sign of personal overwhelm. This card is not a diagnostic tool and not a treatment guide. ## You now understand what happens in the brain during mental overload. Three ways to go further: **① Deepen now – Mind Rooms** The complete e-book on the spatial method for mental clarity. $9.70 [View e-book](https://www.mindrooms.net/e-book/) Or order via email: buch@exponere.de $9.70 via PayPal, the e-book will be sent to your PayPal email **② Community – skool.com/supervision** Daily answers from Johannes Faupel to community questions and discussion of the maps. $37 / month [Join skool.com/supervision](https://www.skool.com/supervision) **③ Personal contact – Phone** Questions about booking options or publications by Johannes Faupel? +49 69 68 60 12 99 No consultations by phone. ## Scientific sources for this map: 1. Funahashi, S. (2017). Working memory in the prefrontal cortex. *Brain Sciences, 7*. [doi.org/10.3390/brainsci7050049](https://doi.org/10.3390/brainsci7050049) 2. Lavie, N., Hirst, A., De Fockert, J., & Viding, E. (2004). Load theory of selective attention and cognitive control. *Journal of Experimental Psychology: General, 133*, 339–354. [doi.org/10.1037/0096-3445.133.3.339](https://doi.org/10.1037/0096-3445.133.3.339) 3. Mäki-Marttunen, V., Hagen, T., & Espeseth, T. (2019). Task context load induces reactive cognitive control: An fMRI study on cortical and brain stem activity. *Cognitive, Affective & Behavioral Neuroscience, 19*, 945–965. [doi.org/10.3758/s13415-019-00691-6](https://doi.org/10.3758/s13415-019-00691-6) --- *These visualisations are scientific educational representations of normal brain functions in the healthy human brain. They are not diagnostic tools, not therapy, and not a substitute for medical or psychotherapeutic treatment.* --- *Source page: https://www.brainmodel.digital/understand-the-brain/mental-overload/ · Author: Johannes Faupel · educational — healthy-brain function, not diagnosis or therapy.*