Episode
White Board Series (Audio Version): Basal Ganglia, Habits, & the Powers of OCD
- Published
- Jan 23, 2026
- Duration seconds
- 470
- Processing state
not_requested- Canonical source
- https://rss.com/podcasts/fromthespectrum/2440276
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Summary
Video https://youtu.be/HBsku5G_SDM In this whiteboard episode, we revisit the basal ganglia's simultaneous "go" and "no-go" pathways, dissecting how excitatory cortical inputs converge on the dorsal striatum's medium spiny neurons, with dopamine from the substantia nigra pars compacta amplifying reward/value while relays (globus pallidus externa/subthalamic nucleus) and outputs (globus pallidus interna/reticulata) fine-tune thalamic drive for action or suppression. Using OCD as an extreme case, we illustrate how enlarged synaptic spines and morphology from repetitive firing hijack the cortico-striato-thalamic loop, prioritizing compulsive habits over flexibility—revealing the circuit's indifference to judgment, driven purely by strengthened connections that conserve energy and dominate behavior in autism and beyond. Daylight Computer Company, use "autism" for $50 off at https://buy.daylightcomputer.com/autism Chroma Light Devices, use "autism" for 10% discount at https://getchroma.co/?ref=autism Fig Tree Christian Golf Apparel & Accessories, use "autism" for 10% discount at https://figtreegolf.com/?ref=autism Cognity AI for Autistic Social Skills, use "autism" for 10% discount at https://thecognity.com 00:00 Basal Ganglia Review Recap of go/no-go pathways; five subcortical areas orchestrate all non-reflex movements simultaneously 00:55 Nuclei Breakdown Inputs: caudate/putamen (dorsal striatum); relays: globus pallidus externa, subthalamic nucleus; outputs: globus pallidus interna, substantia nigra reticulata (GABA) 02:54 Modulator Role Substantia nigra pars compacta (dopamine D1 excitatory/D2 inhibitory) amplifies value/reward; intensifies signals ("worth doing" or "avoid") 05:40 OCD as Extreme Example OCD hijacks cortico-striato-thalamic loop; repetitive compulsio…