Working memory maintenance can occur through:

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In addressing how working memory maintenance can occur, we need to consider the proposed mechanisms and what neuroscience literature supports.
Option 1: 'Only persistent neural firing' suggests that maintenance relies solely on continuous spiking activity. While persistent firing can support short-term maintenance, this view is too narrow because evidence also points to maintenance via synaptic changes that can hold information without continuous activity.
Option 2: 'Only synaptic potentiation' implies that maintenance is achieved exclusively through strengthened synapses with no need for ongoing neural firing. Although synaptic mechanisms contribute to working memory, many findings show that persistent activity can sustain information over brief intervals, so this option is incomplete.
Option 3: 'Either persistent neural firing or synaptic potentiation' presents a more accurate, dual-mechanism perspective. Some memories are kept by sustained neural activity, while others can be stored or stabilized through short-term synaptic changes, depending on the task and timescale. This accommodates multiple lines of evidence that support both routes.
Option 4: 'Neither of these mechanisms' would be incorrect because substantial research demonstrates roles for both persistent activity and synaptic modulation in maintaining information, ruling out the idea that neither could be involved.
Putting it together, the most comprehensive interpretation allows for either mechanism to support maintenance, aligned with findings across experiments that reveal alternative maintenance strategies under different conditions.

PSC 135 001 SQ 2025 Lecture 20 Quiz: Working Memory I

Working memory maintenance can occur through:

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