Infralimbic Cortex 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.
Infralimbic Cortex Pyramidal Neurons is a specialized neuronal population involved in emotion regulation and executive function. These neurons play critical roles in fear extinction, decision-making, and working memory and are vulnerable in various neurodegenerative diseases. [1]
The Infralimbic Cortex (IL) is a medial prefrontal cortex region that plays a crucial role in emotional regulation, fear extinction, reward processing, and autonomic control. Located in the ventral portion of the prefrontal cortex, IL pyramidal neurons are key integrators of limbic and autonomic information. [2]
| Taxonomy | ID | Name / Label |
|---|---|---|
| Cell Ontology (CL) | CL:0000598 | pyramidal neuron |
| Database | ID | Name | Confidence | [3]
|----------|----|------|------------| [4]
| Cell Ontology | CL:0000598 | pyramidal neuron | Medium | [5]
| Attribute | Value | [6]
|-----------|-------|
| Full Name | Infralimbic Cortex Pyramidal Neurons |
| Abbreviation | IL |
| Location | Medial prefrontal cortex, ventral to the prelimbic cortex, Brodmann area 32/25 |
| Cell Type | Glutamatergic pyramidal neurons |
| Layer | Layer 2/3 and Layer 5 |
| Allen Atlas ID | Mouse: 170 |
IL pyramidal neurons exhibit characteristic pyramidal morphology:
Key molecular markers for IL pyramidal neurons:
The Infralimbic Cortex is the primary cortical region for fear extinction:
IL plays a key role in regulating emotional responses:
Key differentially expressed genes in Infralimbic Cortex (from Allen Brain Atlas):
| Gene | Expression Level | Function |
|---|---|---|
| CaMKIIα (Camk2a) | High | Excitatory signaling, synaptic plasticity |
| Vglut1 (Slc17a7) | High | Glutamate neurotransmission |
| FOXP2 | High | Transcription factor, language/emotion |
| Reelin | Moderate | Developmental migration, plasticity |
| Bcl11b (CTIP2) | Moderate | Transcription factor, survival |
| Rorb | Moderate | Circadian rhythm regulation |
| Satb2 | Moderate | Chromatin remodeling, plasticity |
Basal amygdala (inhibitory control)
Ventral striatum (reward)
Hypothalamic nuclei (autonomic)
Periaqueductal gray (pain modulation)
Prelimbic Cortex Pyramidal Neurons
Anterior Cingulate Cortex Pyramidal Neurons
Medial Prefrontal Cortex
The study of Infralimbic Cortex 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.
Sotres-Bayon F, Cain CK, LeDoux JE. Brain mechanisms of fear extinction: historical perspectives and therapeutic approaches. Neurosci Biobehav Rev. 2006. ↩︎
Etkin A, Wager TD. Functional neuroimaging of anxiety: a meta-analysis of emotional processing in PTSD, social anxiety disorder, and specific phobia. Am J Psychiatry. 2007. ↩︎
Vertes RP. Differential projections of the infralimbic and prelimbic cortex in the rat. Learn Mem. 2004. ↩︎
Maren S. Neurobiology of Pavlovian fear conditioning. Annu Rev Neurosci. 2001. ↩︎
Arnsten AF. Prefrontal cortical network connections: key circuit for targeting cognitive deficits. J Clin Psychiatry. 2014. ↩︎
Seeley WW, Zhou J, Kim EJ. Frontotemporal dementia: the impact of frontotemporal lobar degeneration on behavior. Dialogues Clin Neurosci. 2012. ↩︎