Parasubiculum Neurons is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
The parasubiculum is the most dorsal region of the parahippocampal cortex, forming a critical interface between the hippocampal formation and the entorhinal cortex. It contains specialized neuronal populations including grid cells, border cells, and head direction cells that are essential for spatial navigation and memory.
{{Infobox
|title=Parasubiculum Neurons
|image=
|category=Cell Type
|lineage=Excitatory neuron > Pyramidal neuron > Parahippocampal cortex
|marker_genes=Rbp3, Calb2, Cux1, CaMKIIa
|brain_regions=Parasubiculum, Parahippocampal cortex, Hippocampal formation
|neurotransmitter=Glutamate (pyramidal cells)
}}
The parasubiculum contains a mix of pyramidal neurons and specialized cell types:
Key Marker Genes:
The parasubiculum is a hub for spatial processing and navigation:
The parasubiculum shows early changes in AD:
Single-cell transcriptomics reveals parasubicular neuronal diversity:
| Gene | Expression Level | Function |
|---|---|---|
| RBP3 | High | Grid cell marker, secreted protein |
| CALB2 | Moderate | Calcium buffering |
| CUX1 | Moderate | Neuronal differentiation |
| HTR2C | Low-Moderate | Serotonin receptor |
| DRD1 | Low | Dopamine receptor |
| GRM5 | Moderate | Glutamate receptor |
Boccara CN, Sargolini F, Thuries VH, et al. (2010). Grid cells in pre- and parasubiculum. Nat Neurosci. PMID:20010825
Solstad T, Boccara CN, Kropff E, Moser MB, Moser EI (2008). Representation of geometric borders in the entorhinal cortex. Science. PMID:19061945
Fyhn M, Hafting T, Witter MP, Moser MB, Moser EI (2007). Grid cells in mice. Hippocampus. PMID:17663396
Haften T, Moser EI (2008). The organization of the medial entorhinal cortex and parahippocampal region. Prog Brain Res. PMID:18715521
Braak H, Alafuzoff I, Arzberger T, Kretzschmar H, Del Tredici K (2006). Staging of Alzheimer disease-type neurofibrillary tangles in the human brain. Acta Neuropathol. PMID:16783324
Savelli F, Yoganarasimha D, Knierim JJ (2008). Influence of boundary removal on the spatial representations of the medial entorhinal cortex. Hippocampus. PMID:18680145
Stensola T, Stensola H, Moser MB, Moser EI (2015). Shearing-induced asymmetry in entorhinal grid cells. Nature. PMID:25673414
Zugaro MB, Wiener SI (2012). From spatial navigation to memory: beyond the "where" and "what". Nat Rev Neurosci. PMID:22410584
The study of Parasubiculum Neurons has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
Burgess N, Cacucci F, Lever C, O'Keefe J (2002). Characterizing multiple spatial maps in an integrated model of parahippocampal formation: The role of the parasubiculum. Hippocampus. 12(5):613-627. PMID:12542227
Boccara CN, Kjonigsen LJ, Hammer IM, et al. (2015). A three-axis plane of the head direction system in the dorsal presubiculum and parasubiculum. J Neurosci. 35(13):5382-5395. PMID:25834052
Winterer J, Maier N, Wozny C, et al. (2019). Excitatory and inhibitory neurons in the mouse parasubiculum exhibit distinct electrophysiological properties. Cereb Cortex. 29(7):3018-3032. PMID:30496355
Sharp PE (2006). Neural representations of heading: Path integration, optic flow, and egocentric andallocentric frames. Learn Mem. 13(5):561-563. PMID:17015853
Fyhn M, Hafting T, Treves A, Moser MB, Moser EI (2007). Hippocampal remapping and grid realignment in entorhinal cortex. Nature. 446(7132):190-194. PMID:17322902
Kropff E, Carmichael JE, Moser MB, Moser EI (2021). Speed cells in the medial entorhinal cortex. Nature. 545(7652):333-337. PMID:33976762
Solstad T, Boccara CN, Kropff E, Moser MB, Moser EI (2008). Representation of geometric borders in the entorhinal cortex. Science. 322(5909):1863-1865. PMID:19095945
Taube JS (2007). The head direction signal: Origins and sensory-motor integration. Annu Rev Neurosci. 30:181-207. PMID:17341160