Single Units and Sensation: 25 Years on

Perception ◽  
1997 ◽  
Vol 26 (1_suppl) ◽  
pp. 230-230
Author(s):  
B Lee
Keyword(s):  
Visual System ◽  
Single Unit ◽  
Single Units ◽  
Single Unit Recording ◽  
Unit Recording ◽  
Visual Neuroscience ◽  
Neurophysiological Data ◽  
20Th Anniversary ◽  
Single Unit Recordings ◽  
Perceptual Psychology

In 1972 Horace Barlow (“Single units and sensation: a neuron doctrine for perceptual psychology?” Perception1 371 – 394) proposed a set of dogmas to guide vision scientists in interpreting neurophysiological data. The 20th anniversary of ECVP is an appropriate occasion to ask if single-unit recordings have really helped us understand the visual system. The answer may be affirmative, but interpreting single-unit data has proved to be much more of a challenge than was anticipated in that early and optimistic era of single-unit recording. I review data from retinal and cortical experiments to illustrate this thesis, and ask if Barlow's dogmas are still relevant to current visual neuroscience.

Cat hindlimb tactile dermatomes determined with single-unit recordings

1978 ◽  
Vol 41 (2) ◽  
pp. 260-267 ◽  
Author(s):  
P. B. Brown ◽  
H. R. Koerber
Keyword(s):  
Dorsal Root ◽  
Single Unit ◽  
Field Size ◽  
Width Ratio ◽  
Single Unit Recording ◽  
Unit Recording ◽  
Length Width ◽  
Low Threshold ◽  
Single Unit Recordings ◽  
Different Parts

1. Single-unit recording from dorsal root ganglia was used to determine the dermatomes of L4-S2 segments in the cat. Dermatomes for low-threshold myelinated mechanoreceptor afferents are smaller than those reported in earlier studies of whole-root dermatomes. There are also sufficient discrepancies among earlier studies and with the present data to merit reexamination of hindlimb whole-root dermatomes. 2. Receptive-field size varies directly with distance from toes. Length/width ratio is essentially constant for different parts of the hindlimb. 3. Estimates of innervation density verify the long-standing assumption that innervation density is greater for foot and toes than for proximal hindlimb, at least for low-threshold cutaneous myelinated afferents.

scholarly journals Pressure-clamped single-fiber recording technique: A new recording method for studying sensory receptors

2020 ◽  
Vol 16 ◽  
pp. 174480692092785 ◽  
Author(s):  
Mayumi Sonekatsu ◽  
Hiroshi Yamada ◽  
Jianguo G Gu
Keyword(s):  
Nerve Fiber ◽  
Single Unit ◽  
Single Fiber ◽  
Single Unit Recording ◽  
Sensory Receptors ◽  
Unit Recording ◽  
Recording Technique ◽  
C Fibers ◽  
Recording Method ◽  
Single Nerve

An electrophysiological technique that can record nerve impulses from a single nerve fiber is indispensable for studying modality-specific sensory receptors such as low threshold mechanoreceptors, thermal receptors, and nociceptors. The teased-fiber single-unit recording technique has long been used to resolve impulses that are likely to be from a single nerve fiber. The teased-fiber single-unit recording technique involves tedious nerve separation procedures, causes nerve fiber impairment, and is not a true single-fiber recording method. In the present study, we describe a new and true single-fiber recording technique, the pressure-clamped single-fiber recording method. We have applied this recording technique to mouse whisker hair follicle preparations with attached whisker afferents as well as to skin-nerve preparations made from mouse hindpaw skin and saphenous nerves. This new approach can record impulses from rapidly adapting mechanoreceptors (RA), slowly adapting type 1 mechanoreceptors (SA1), and slowly adapting type 2 mechanoreceptors (SA2) in these tissue preparations. We have also applied the pressure-clamped single-fiber recordings to record impulses on Aβ-fibers, Aδ-fibers, and C-fibers. The pressure-clamped single-fiber recording technique provides a new tool for sensory physiology and pain research.

On the search for the vocal pattern generator. A single-unit recording study

Neuroreport ◽  
2000 ◽  
Vol 11 (9) ◽  
pp. 2031-2034 ◽  
Author(s):  
Frank Düsterhöft ◽  
Udo Häusler ◽  
Uwe Jürgens
Keyword(s):  
Single Unit ◽  
Pattern Generator ◽  
Single Unit Recording ◽  
Unit Recording

scholarly journals Opportunities and Challenges for Single-Unit Recordings from Enteric Neurons in Awake Animals

2018 ◽  
Author(s):  
Bradley Barth ◽  
Hsin-I Huang ◽  
Gianna Hammer ◽  
Xiling Shen
Keyword(s):  
Nervous System ◽  
Single Unit ◽  
Gastrointestinal System ◽  
Enteric Neurons ◽  
Unit Recording ◽  
Neural Recordings ◽  
Neuroscience Research ◽  
Single Unit Recordings ◽  
Excised Tissue ◽  
Intrinsic Neurons

Advanced electrode designs have made single-unit neural recordings commonplace among modern neuroscience research. However, single-unit resolution remains out of reach for the intrinsic neurons of the gastrointestinal system. Single-unit recordings of the enteric (gut) nervous system have been conducted in anesthetized animal models and excised tissue, but there is a large physiological gap between awake and anesthetized animals, particularly for the enteric nervous system. Here, we describe the opportunity for advancing enteric neuroscience offered by single-unit recording capabilities in awake animals. We highlight the primary challenges to microelectrodes in the gastrointestinal system including structural, physiological, and signal quality challenges.

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