Related Experiment Video
Updated: Jan 27, 2026
11:28
Recording Network Activity in Spinal Nociceptive Circuits Using Microelectrode Arrays
Published on: February 9, 2022
3.4K
Effect of phobic visual stimulation on spinal nociception
Gaia Fragiotta1, Francesco Pierelli2, Gianluca Coppola3
1"Sapienza" University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechonologies, Latina, Italy.
Physiology & Behavior
|March 24, 2019
Summary
Strong negative emotions, like phobias, amplify spinal nociceptive withdrawal reflexes (NWR) without altering pain perception. This effect, more pronounced in women, highlights emotions' impact on defensive responses.
Area of Science:
- Neuroscience
- Psychophysiology
- Pain Research
Background:
- Understanding the interplay between emotions and pain processing is crucial for pain management.
- Strong negative emotions may influence spinal nociception, the processing of pain signals in the spinal cord.
Purpose of the Study:
- To investigate how fear-related emotional stimuli affect spinal nociception and pain perception.
- To examine the nociceptive withdrawal reflex (NWR) and associated pain ratings in individuals with specific phobias.
Main Methods:
- Healthy subjects with a specific phobia of small animals were exposed to neutral and phobic videos.
- The nociceptive withdrawal reflex (NWR) was measured via EMG activity.
- Pain perception was quantified using a numerical rating scale (NRS); heart rate and emotional states were also monitored.
Main Results:
- NWR amplitude significantly increased during exposure to phobic videos, correlating with fear levels.
- Pain perception (NRS scores) remained unchanged, indicating a dissociation between NWR and pain experience.
- Women exhibited higher NWR amplitude and slower recovery than men.
Conclusions:
- Fear-inducing stimuli enhance spinal nociceptive processing and withdrawal reflexes independently of pain perception.
- This suggests emotions heighten defensive responses by amplifying nociceptive signals without altering subjective pain.
- Sex differences in emotional modulation of nociception warrant further investigation for optimized pain management strategies.
Related Concept Videos
01:44Nociception
33.2K
Nociception—the ability to feel pain—is essential for an organism’s survival and overall well-being. Noxious stimuli such as piercing pain from a sharp object, heat from an open flame, or contact with corrosive chemicals are first detected by sensory receptors, called nociceptors, located on nerve endings. Nociceptors express ion channels that convert noxious stimuli into electrical signals. When these signals reach the brain via sensory neurons, they are perceived as pain.
33.2K
01:26Spinal Cord
1.7K
The spinal cord, a critical component of the central nervous system, extends from the base of the brainstem to the lumbar region of the vertebral column. It is essential for maintaining physical stability and facilitating communication between the brain and peripheral parts of the body.
1.7K
01:54The Spinal Cord
31.6K
The spinal cord is the body’s major nerve tract of the central nervous system, communicating afferent sensory information from the periphery to the brain and efferent motor information from the brain to the body. The human spinal cord extends from the hole at the base of the skull, or foramen magnum, to the level of the first or second lumbar vertebra.
31.6K
01:29Stimulants
883
Stimulants are substances that enhance neural activity and elevate dopamine levels in the brain, leading to their highly addictive nature. These drugs include cocaine, amphetamines, MDMA, caffeine, and nicotine, each with distinct mechanisms of action and varied health implications.
Cocaine can be administered via snorting, injection, or smoking. It primarily functions by blocking the reuptake of dopamine, resulting in a euphoric high characterized by an intense sensation of happiness and...
Cocaine can be administered via snorting, injection, or smoking. It primarily functions by blocking the reuptake of dopamine, resulting in a euphoric high characterized by an intense sensation of happiness and...
883
01:10Spinal Cord: Information Processing
3.3K
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...
3.3K
01:21Spinal Nerves: Plexus II
2.2K
The plexuses of the lower body include the lumbar, sacral, and coccygeal plexuses, which innervate the abdomen, pelvis, legs, and coccygeal region. These plexuses control the transmission of sensory information and coordinate motor functions of the lower body.
The Lumbar Plexus
The lumbar plexus is situated within the lumbar region of the back and is primarily formed by the first four lumbar spinal nerves (L1 to L4). This plexus extends its branches into several nerves, including the...
The Lumbar Plexus
The lumbar plexus is situated within the lumbar region of the back and is primarily formed by the first four lumbar spinal nerves (L1 to L4). This plexus extends its branches into several nerves, including the...
2.2K