Martinotti cells send axons to layer I in the cortex to inhibit the tufts of pyramidal cells. The axons can spread horizontally in layer I for several millimeters and therefore provide synaptic inhibition across cortical columns. Martinotti cells also target other subcellular compartments. They express SST.

Where are Martinotti cells found?

cerebral cortex
Martinotti cells are small multipolar neurons with short branching dendrites. They are scattered throughout various layers of the cerebral cortex, sending their axons up to the cortical layer I where they form axonal arborization.

What are the layers of cerebral cortex?

There are six layers of cerebral cortex:

• Molecular (plexiform) layer.
• External granular layer.
• External pyramidal layer.
• Internal granular layer.
• Internal pyramidal layer.
• Multiform (fusiform) layer.

What is the role of reelin?

Reelin is a large secreted extracellular matrix glycoprotein that helps regulate processes of neuronal migration and positioning in the developing brain by controlling cell–cell interactions. Besides this important role in early development, reelin continues to work in the adult brain.

What are Martinotti cells?

Martinotti cells are small multipolar neurons with short branching dendrites. They are scattered mainly in cortical layer III and V with axonal arborization in cortical layer I and make contacts with the distal tuft dendrites of pyramidal cells in multiple columns.

Where are Purkinje cells?

Purkinje cell, large neuron with many branching extensions that is found in the cortex of the cerebellum of the brain and that plays a fundamental role in controlling motor movement. These cells were first discovered in 1837 by Czech physiologist Jan Evangelista Purkinje.

What are the three layers of the cerebellar cortex?

The cerebellar cortex is made up of three layers: an outer molecular layer made up of axons and dendrites of cerebellar neurons, a purkinje cell layer, and a granular layer made up of small granule cells. Cerebellar cortex.

What regulates reelin expression?

In most of the brain, Reelin is expressed by GABAergic interneurons that regulate the activity and function of neighboring glutamatergic neurons (Pesold et al., 1998; Ramos-Moreno et al., 2006).

What type of molecule is reelin?

Reelin is a secreted extracellular matrix protein composed of 3,461 aa with a relative molecular mass of 388 kDa (14, 15) (Fig. 1A). The N terminus of Reelin has 25% identity with that of F-spondin, an extracellular matrix protein that controls the adhesion and extension of commissural axons in the spinal cord (17).

What are local neurons?

H2.00.06.1.00058. FMA. 67313. Anatomical terms of neuroanatomy. Interneurons (also called internuncial neurons, relay neurons, association neurons, connector neurons, intermediate neurons or local circuit neurons) are neurons that connect two brain regions, i.e. not direct motor neurons or sensory neurons.

What are the Purkinje cells?

Purkinje cells are a unique type of neuron-specific to the cerebellar cortex. They are remarkable (and instantly recognizable) for their massive, intricately branched, flat dendritic trees, giving them the ability to integrate large amounts of information and learn by remodeling their dendrites.