Pyramidal 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.
Pyramidal neurons are the principal excitatory neurons in the cerebral cortex and hippocampus. They are characterized by their triangular-shaped cell bodies (soma) and long apical dendrites. These neurons are the primary projection neurons, sending axons to distant brain regions and forming the major output of the cortical column.
- Cell Body: Triangular/pyramidal shape
- Dendrites: Single apical dendrite, multiple basal dendrites
- Axon: Long projection axon, often with extensive collateral branches
- Neurotransmitter: Glutamate (excitatory)
- Markers: CTIP2, SATB2, TBR1, NeuroD1
- Layer 2/3 pyramidal neurons: Association connections, callosal projections
- Layer 5 pyramidal neurons: Subcortical projections, corticostriatal
- Layer 6 pyramidal neurons: Thalamic projections
- Primary excitatory neurons in cortex
- Integrate synaptic inputs across dendritic tree
- Generate action potentials at axon initial segment
- Transmit information to local and distant brain regions
- Loss of pyramidal neurons in hippocampus (CA1)
- Dendritic spine loss
- Synaptic dysfunction
- Hyperexcitability in early stages
- Cortical pyramidal neuron involvement
- Executive dysfunction
- Cognitive decline
- Upper motor neuron degeneration
- Corticospinal tract involvement
The study of Pyramidal 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.
- Spruston N. Pyramidal neurons: dendritic structure and synaptic integration. Nat Neurosci. 2008.
- DeFelipe J. The pyramidal neuron. Cereb Cortex. 2023.
- Greig LC, et al. Molecular logic of neocortical projection neuron specification, development and diversity. Nat Rev Neurosci. 2023.