Stanford Interdisciplinary Graduate Fellowships (SIGFs)

Constipation and diarrhea, caused by aberrant water absorption in the colon, impose substantial health burdens. The enteric nervous system (ENS) harbors a specialized circuit for water absorption, the secretomotor/vasodilator circuit, but its role in the proximal colon remains poorly understood.

The medial entorhinal cortex (MEC), the brain’s “inner GPS”, contains an internal map of external space. Rather than representing a static spatial map, however, MEC neurons can spontaneously switch between multiple maps (Low et al., 2021). In this project, we will investigate if spontaneous map switches reflect changes in an animal’s latent internal state.

Understanding representational drift—the brain’s evolving representation of its environment—is pivotal to gaining insights into neural computation. Despite its significance, the study of representational drift has been constrained by the scarcity of suitable datasets and methods.

Parkinson’s disease (PD) is a complex, heterogeneous neurodegenerative disorder whose prevalence is increasing rapidly. Not only do patients experience motor symptoms, but many experience debilitating nonmotor symptoms caused by peripheral degeneration in the autonomic nervous system, including atrophy of the vagus nerve, and the enteric nervous system.

Dr. Darian Hadjiabadi aims to identify higher-order features of neuronal circuits responsible for seizure initiation and propagation by quantifying mesoscale-network reorganization in genetic models of zebra sh that faithfully recapitulate seizure dynamics in humans.

Schwann cells (SCs) sort and myelinate peripheral axons, and impairments in either process can cause long-term disability. There are no therapeutic strategies for targeting SC dysfunction, underscoring the need to investigate mechanisms of sorting and myelination. Both processes require highly motile SC cytoplasmic protrusions, but the basis of this motility is unclear.

Many neurological injuries and diseases such as brainstem stroke and Amyotrophic Lateral Sclerosis (ALS) result in severe speech impairment, drastically reducing quality of life. Recent progress in brain-computer interfaces (BCI) has allowed these individuals to communicate, but performance is still far lower than typical spoken conversation speeds.

Understanding the relationship between structure and function in the human brain is a key interest in neuroscience. In recent years the focus is turning to understanding the role of the white matter in human cognition, brain function and neurological disorders.