Related Experiment Video
Updated: Jul 9, 2026
04:59
Spinal Cord Electrophysiology
Published on: January 18, 2010
On coupling and decoupling of spinal interneuronal networks
E Jankowska1, D J Maxwell, B A Bannatyne
1Department of Physiology, University of Göteborg, Sweden. Elzbieta.Jankowska@physiol.gu.se
Archives Italiennes De Biologie
|December 14, 2007
Summary
Spinal interneuronal networks show significant interweaving, particularly between dorsal horn and reticulospinal neurons. This complex connectivity influences reflex actions and neuronal communication within the spinal cord.
Area of Science:
- Neuroscience
- Spinal Cord Research
- Neuronal Networks
Background:
- Spinal interneuronal networks are crucial for processing sensory information and generating motor commands.
- Understanding the interconnections between these networks is essential for deciphering complex reflex actions.
Purpose of the Study:
- To review the interrelations between different spinal interneuronal networks.
- To identify key sites of coupling and their functional implications.
Main Methods:
- Electrophysiological analysis
- Pharmacological studies
- Morphological investigation
- Immunohistochemical techniques
Main Results:
- Established significant interweaving between networks of interneurones mediating reflex actions and reticulospinal neurones.
- Identified two primary sites of coupling: dorsal horn interneurones with intermediate zone/commissural interneurones, and commissural interneurones with reticulospinal neurones.
- Reviewed mechanisms for strengthening and weakening neuronal coupling.
Conclusions:
- Spinal interneuronal networks are highly interconnected, influencing reflex pathways.
- Specific coupling sites, involving dorsal horn and reticulospinal inputs, are critical for information processing.
- Modulation of coupling strength offers potential avenues for therapeutic intervention.
More Related Videos
Related Concept Videos
01:10Spinal Cord: Information Processing
The spinal cord is an integral hub for motor and sensory information that enables the brain to communicate with the peripheral nervous system (PNS). This communication consists of relaying sensory data and transmission of motor commands.
Sensory Information Processing
Sensory information processing begins at the sensory receptors located in the skin and other tissues, which detect somatic sensory stimuli such as touch, temperature, or pain. These receptors function as catalysts, initiating...
Sensory Information Processing
Sensory information processing begins at the sensory receptors located in the skin and other tissues, which detect somatic sensory stimuli such as touch, temperature, or pain. These receptors function as catalysts, initiating...
01:28Neuronal Communication
Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
01:25Neural Circuits
Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
01:19The Role of Ion Channels in Neuronal Computation
A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential.
01:28Electrical Synapses
Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
01:14Spinal Cord Injury ll: Pathophysiology
Spinal cord injury progresses through two interconnected phases: primary injury and secondary injury.Primary InjuryPrimary injury happens at the moment of trauma and involves immediate mechanical damage to the spinal cord.Compression happens when broken vertebrae, herniated discs, or accumulating blood (such as a hematoma) press directly against the spinal cord, distorting its normal shape and function. In cases of contusion, the cord is bruised by a blunt force (like penetrating injuries or...