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Dissociable oscillatory theta signatures of memory formation in the developing brain


🎤 Vocab

❗ Information

Description

Dr. Anand Shankar, Postdoctoral Fellow at The Laboratory for Intracranial Neurophysiology led by Dr. Jack Lin, will present on Dr. Elizabeth Johnson’s research prior to her seminar talk. The following paper will be presented:

Dissociable oscillatory theta signatures of memory formation in the developing brain

Uses Bayes Factor Estimation
Uses ECoG

✒️ -> Scratch Notes

Interactions between MTL and PFC

  • Analyze theta oscillation
    • Identify two, slow and fast theta
    • Each play a unique role in memory processing

Strength and patern of connectiions between brain regions change significantly during development

  • Understanding connectivity is vital for studying how development of the brain influence cognitive functions and abilities

Memory

Not a function of a signle brain region, interaction among different ones

  • Interaction betweens MTL and PFC vital
    MTL vital in forming new episodic memories
    PFC involved in higher order cognitive processes
    Interactions between em mature with age.

Brain Rythms (BRs) help to coordinate firingpatterns of neurons in different regios.

  • Theta rythms particulalry important for memory formation and retrieval
    • Slow theta (~2 are linked to memory integration and attention control)
    • Fast theta oscillations associating with WM and exec control

Study

This study uses ECoG

  1. A task of studying visual scenes, classifying indoor/outdoor
  2. Recognition test
    4 possible responses, hit, miss, etc.

Diffusion-Weighted Imaging (DWI) analysis

  • structural connectivity?

Amplitude Coupling (AC) and Phase Locking ? (PLC)
Inter regional phase amplitude coupling (PAC)

IFG / MFG / SFG ?

no clue what the heck happened at any point onwards


Review with Dr. Lin

Hard to see if memories formed in brain, so participants must go through learning the visual scenes. After the 1. Study Block, we move to the 2. Recognition Test. Here is where we evaluate if memory successfully ormed.
subsequent memory effect - common way of studying if a memory is formed or not. Seeing the memory patterns / brain patterns

hit - miss.

🧪 -> Refresh the Info

Did you generally find the overall content understandable or compelling or relevant or not, and why, or which aspects of the reading were most novel or challenging for you and which aspects were most familiar or straightforward?)

Did a specific aspect of the reading raise questions for you or relate to other ideas and findings you’ve encountered, or are there other related issues you wish had been covered?)

Resources

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Connections

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