[Verse 1] Deep beneath the cortex where decisions start to brew Basal ganglia circuits sorting what we ought to do Motor patterns competing in a neural traffic jam Action selection protocol like a biological RAM Neurotransmitter signals firing from the brainstem's core Striatum receives the messages, opens up the motor door Direct pathway says "let's go" while indirect says "wait and see" Elegant coordination in this subcortical spree [Chorus] Pros of basal ganglia design Solving action selection fine Anatomical precision meets the functional divine Clinical windows show us when the circuits fall behind Computational models map the workings of the mind Pros of basal ganglia design [Verse 2] Parkinson's reveals the truth when signals start to fade Bradykinesia creeps in, movements get delayed Huntington's shows chaos when the striatum decays Choreic writhing demonstrates these pathways gone astray OCD emerges when the cognitive control Gets stuck in repetition loops beyond the motor goal Frontal cortex regions trapped in striatal chains Teaching us that movement and thought share the same reins [Chorus] Pros of basal ganglia design Solving action selection fine Anatomical precision meets the functional divine Clinical windows show us when the circuits fall behind Computational models map the workings of the mind Pros of basal ganglia design [Bridge] From motor plans to cognitive schemes The same circuitry fulfills our dreams Globus pallidus gates the flow Subthalamic nucleus says yes or no Reinforcement learning algorithms predicted right What evolution carved in neural pathways bright [Verse 3] Computational frameworks match the behavioral data Actor-critic models solving motor state mantra Temporal difference learning in the signal response Reward prediction errors guide our neural correspondence What started as a motor story grew to something more Cognitive control emerges from this ancient neural core Executive attention, working memory's demands All filtered through the circuitry that moves our very hands [Verse 4] Dependencies hijack circuits meant for natural reward Substances block the transporters, leave signals unstored Habits form through repetition in the dorsal striatum's hold While ventral regions process the emotions we've been told [Chorus] Pros of basal ganglia design Solving action selection fine Anatomical precision meets the functional divine Clinical windows show us when the circuits fall behind Computational models map the workings of the mind Pros of basal ganglia design [Outro] From movement to cognition, one design Basal ganglia prove that nature's architecture is divine
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