Question

The main input to the dentate gyrus originates from which part of brain and via which fiber path?

Short answer

Answer: The main input source to the dentate gyrus is the entorhinal cortex, and the fiber path through which this input travels is the perforant path.

Step-by-step solution

Identifying the main input source to the dentate gyrus

The main input to the dentate gyrus originates from the entorhinal cortex, a part of the brain located in the medial temporal lobe. The entorhinal cortex plays an essential role in forming memories and spatial navigation.

Identifying the fiber path

The entorhinal cortex connects to the dentate gyrus via a fiber path known as the perforant path. The perforant path carries signals from the entorhinal cortex to the hippocampus, specifically the dentate gyrus, allowing communication between these two important regions of the brain. In summary, the main input to the dentate gyrus originates from the entorhinal cortex, and the fiber path through which this input travels is the perforant path.