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Related Concept Videos

Brainstem01:19

Brainstem

The brainstem, located inferior to the brain and superior to the spinal cord, serves as a bridge between the cerebrum and the spinal cord. It plays a vital role in relaying information and controlling critical life functions. It comprises three primary regions: the midbrain, pons, and medulla oblongata.
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...
Brainstem: Control Centers of Medulla01:21

Brainstem: Control Centers of Medulla

The medulla oblongata is a crucial part of the brainstem responsible for controlling various autonomic and involuntary functions. It contains several nuclei, including the olivary, cuneate, gracile, and solitary nuclei.
Olivary Nucleus
The olivary nucleus, or inferior olivary nucleus, is located within the ventrolateral part of the medulla oblongata. It is primarily involved in motor coordination and motor learning. The olivary nucleus receives input from the spinal cord, cerebellum, and motor...
Cerebellum: Anatomical Regions01:17

Cerebellum: Anatomical Regions

The cerebellum, also known as the "little brain," is located in the posterior cranial fossa, inferior to the tentorium cerebelli and dorsal to the brainstem. It plays a significant role in motor control, coordination, and proprioception.
Cerebellar Structure
Externally, the cerebellum features a highly convoluted surface with numerous folia (narrow ridges) separated by shallow sulci (grooves). The cerebellum is divided into two hemispheres by a thin median structure known as the vermis. The...
Antiepileptic Drugs: GABAergic Pathway Potentiators01:18

Antiepileptic Drugs: GABAergic Pathway Potentiators

γ-aminobutyric acid or GABA, plays a pivotal role as an inhibitory neurotransmitter in the brain. GABA pathway potentiators, also known as GABAergic drugs, are a class of pharmaceutical agents designed to enhance the functioning of the GABAergic system. These medications primarily treat epilepsy, a neurological disorder characterized by recurrent seizures.
The key GABA pathway potentiators used in epilepsy management are as follows.
Benzodiazepines are a well-known class of drugs used for their...
Diencephalon: Anatomical Regions01:30

Diencephalon: Anatomical Regions

The diencephalon, etymologically translated as 'through brain,' plays an integral role as the conduit between the cerebrum and the vast extent of the nervous system. However, the olfactory system is an exception, as it interfaces directly with the cerebrum. The diencephalon, deeply ensconced beneath the cerebrum, primarily consists of three paired structures — the thalamus, hypothalamus, and epithelamus. It also includes accessory structures such as the subthalamus, which houses the subthalamic...
Indirect Motor Pathways01:22

Indirect Motor Pathways

The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...

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Related Experiment Video

Updated: Jul 16, 2026

Recording Gamma Band Oscillations in Pedunculopontine Nucleus Neurons
09:04

Recording Gamma Band Oscillations in Pedunculopontine Nucleus Neurons

Published on: September 14, 2016

GABAergic modulation of developing pedunculopontine nucleus.

Kevin D Bay1, Paige Beck, Robert D Skinner

  • 1Center for Translational Neuroscience, Department of Neurobiology & Developmental Sciences, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USA.

Neuroreport
|February 23, 2007
PubMed
Summary

Gamma-amino-butyric acid (GABA) inhibition influences rapid eye movement (REM) sleep during development. Increasing GABAergic inhibition of pedunculopontine neurons contributes to the developmental decrease in REM sleep, particularly in noncholinergic cells.

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Last Updated: Jul 16, 2026

Recording Gamma Band Oscillations in Pedunculopontine Nucleus Neurons
09:04

Recording Gamma Band Oscillations in Pedunculopontine Nucleus Neurons

Published on: September 14, 2016

Manufacturing and Using Piggy-back Multibarrel Electrodes for In vivo Pharmacological Manipulations of Neural Responses
06:52

Manufacturing and Using Piggy-back Multibarrel Electrodes for In vivo Pharmacological Manipulations of Neural Responses

Published on: January 18, 2013

Whole-cell Currents Induced by Puff Application of GABA in Brain Slices
07:32

Whole-cell Currents Induced by Puff Application of GABA in Brain Slices

Published on: October 12, 2017

Area of Science:

  • Neuroscience
  • Developmental Biology
  • Sleep Research

Background:

  • Rapid eye movement (REM) sleep significantly declines during organismal development.
  • The precise mechanisms underlying this developmental decrease in REM sleep are not fully understood.
  • Reticular activating system (RAS) neurons play a crucial role in regulating REM sleep.

Purpose of the Study:

  • To investigate the role of GABAergic inhibition in the developmental decrease of REM sleep.
  • To test the hypothesis that GABAergic inhibition of RAS neurons contributes to REM sleep reduction.
  • To examine the effects of GABA receptor agonists on pedunculopontine (PPN) neurons during development.

Main Methods:

  • In vitro electrophysiological recordings were performed on PPN neurons from animals at different developmental stages.
  • The effects of gamma-amino-butyric acid (GABA) receptor agonists, muscimol (GABA-A) and baclofen (GABA-B), were assessed.
  • Cholinergic and noncholinergic PPN neuron populations were distinguished and analyzed separately.

Main Results:

  • Muscimol depolarized noncholinergic PPN cells early in development and hyperpolarized them later.
  • Baclofen induced hyperpolarization in both cholinergic and noncholinergic PPN cells, with a diminishing effect as development progressed.
  • The influence of GABAergic inhibition on PPN neurons changes with age, predominantly affecting noncholinergic cells.

Conclusions:

  • Increasing GABAergic inhibition of PPN neurons contributes to the developmental decrease in REM sleep.
  • This GABAergic influence appears to be primarily mediated through GABA-A receptors on noncholinergic PPN neurons.
  • Developmental changes in GABAergic signaling within the PPN are a significant factor in regulating REM sleep.