Auditory temporal masking: an electrophysiological study of single neurons in the cat's cochlear nucleus and inferior colliculus — TEI-tagged view

Watanabe, Simada · 1971 · auditory-neurophysiology · doi:10.2170/jjphysiol.21.537 · full text at the source · TEI xml · tagged edition · index · concepts · authors
Where this record's text came from. faceted 2026-08 by reading the locally held text (pdftext); every evidence string verified as an exact substring of that text before merging. PDF extraction is heavily scrambled in the Summary paragraph and in figure captions (word order transposed, 'ƒ¢t'/'(cid:129)¢t' for Δt), so all quotes were taken from clean, intact sentences in Methods, Results and Discussion. The paper also contains a null-result component (no backward masking at the cochlear nucleus: 'Backward masking may involve central processes because it was not demonstrable in the cochlear nucleus.'), but the overall shape of the contribution is mechanistic, so claim type is mechanism. The third limitation quote deliberately stops before a page-break header ('which seems to TEMPORAL MASKING 549 be difficult to demonstrate at present') so it remains an exact substring. STARR (1965) is cited in the Discussion but the paper does not state a relation of its own claims to that work, so no relation was recorded for it. Replication status is 'untested' because the paper reports no replication of its own neural findings; the correspondence with Elliott's and Pickett's psychophysical curves is cross-method convergence, not replication. 2026-08-19 and 2026-08-25 schema-0.3 passes: every quote verified as an exact substring of the staged text and anchored at merge time; concept terms verified present; every edge endpoint an existing node.
Some quotes on this page contain (cid:NN). The PDF this text was extracted from encodes 3 characters in a way that names no letter, so the extractor could not say what they were. The quotes keep them because a quote is reproduced exactly or it proves nothing — the marks are the source’s, not the tagging’s.
Tags on this paper every tag the record carries, whether or not the words occur in the text below — a number is how many papers in the corpus carry that tag; a tag with no number is unique to this paper
simultaneous masking temporal masking backward masking3 cochlear nucleus6 electrophysiology110

Our tag layer for this paper

Cross-disciplinary analysis
content-tags & facets: phenomenon · claim-type · cross-domain-transfer · mechanism · claim-relation · replication-status · limitation — grounded in the full text
phenomenonauditory temporal masking— “The physiological mechanism of auditory temporal masking was studied by single-unit analysis in the cat's cochlear nucleus and inferior colliculus.” [checked against the archived source, not this rendering]
claim-typemechanism— “The mechanism of forward masking may be due to the postexcitatory inhibition of some slow-adapting neurons and to synaptic inhibition for fast-adapting ones.” [checked against the archived source, not this rendering]
method — evidence— “The recording system for neuronal activity was conventional; single-unit activity was recorded extracellularly by a tungsten microelectrode and stored on magnetic tape for subsequent off-line computation.” [checked against the archived source, not this rendering]
mechanismA faint probe tone drives an abnormally long response latency in collicular neurons, so the probe's discharge arrives at or after the discharge evoked by the following noise burst and is absorbed into it, which produces backward masking— “In the backward masking situation with a masking interval of 0 msec, the latency in response to noise bursts calculated from the beginning of the probe tone becomes 20msec. Accordingly, the unit does not elicit backward masking in the case of a latency of less than 20msec in response to the probe tone.”mechanisms[0]
builds-on ELLIOT (1962a)— “For monotic conditions of forward and backward masking, the parameters of the stimulating sounds used were the same as those employed by ELLIOT (1962a).” [checked against the archived source, not this rendering]claim_relations[0]
extends ELLIOTT (1962a, b) and PICKETT (1959)— “As shown in Fig. 8, the relationship between the amount of masking and the masking interval between the probe tone and the noise burst shows tendencies similar to those in the psychological data of ELLIOTT (1962a, b) and PICKETT (1959), although the curves indicate some differences from neuron to neuron.”claim_relations[1]
senseTHE DISTINCTION IS PSYCHOLOGICAL AND THE ARGUMENT IS ANATOMICAL. `From the psychological point of view two kinds of auditory masking are known, that is, simultaneous and temporal masking` - a split made by psychophysics, which this paper then tests by asking where in the cat's auditory pathway each one appears. A behavioural taxonomy checked against anatomy, which is the move Carlesimo2004 makes for priming thirty-three years later and mcmahon-olson2007 makes for repetition suppression— “From the psychological point of view two kinds of auditory masking are known, that is, simultaneous and temporal masking.”senses[0]
senseAND THE LOCATION IS ESTABLISHED BY AN ABSENCE: `Backward masking may involve central processes because it was not demonstrable in the cochlear nucleus.` Nothing was found at the first relay, therefore the mechanism is above it. A null result at one recording site doing positive work - which only holds because the same preparation DID show forward masking there, so the absence is not a failure of the methodsenses[1]
senseIT IS THE PHYSIOLOGY OF marcel1983's INSTRUMENT, AND NEITHER CITES THE OTHER. marcel1983 uses backward masking to render a prime unreportable and shows that semantic access survives it; this paper, twelve years earlier and in cats, asks WHERE backward masking happens and answers `not in the cochlear nucleus`. One paper uses the tool, the other locates it. The corpus holds both, and the pairing is only visible because they sit side by side - the sixth such pair found tonightsenses[2]
controlboth stimulus conditions held constant while the masking measurement was made — held — rules out a change in the stimulus itself explaining the change in maskingcontrols[0]
controlmasking measured as the difference in probe-tone threshold with and without the noise burst, at each delay — held — rules out the probe threshold itself drifting - the with/without difference at the same delay cancels anything common to bothcontrols[1]
outcome (stated by the tagger, no quotation)control — heldcontrols[0]
outcome (stated by the tagger, no quotation)control — heldcontrols[1]
replicationuntested
limitationOnly a small number of collicular units showed backward masking, so the effect rests on few cells.
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
limitations[0]
limitationRecordings were made under anesthesia and restraint; the authors say further work in unanesthetized, unrestrained animals is needed for the higher auditory centres.
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
limitations[1]
limitationA possible fourth mechanism (feedback inhibition from higher levels) could not be demonstrated with the present methods.
Quotation withheld — our stored copy of this sentence carries a text-extraction fault (two words run together), so it is not what the paper says. The tag itself stands; the sentence is being re-fetched.
limitations[2]
Content tags
content-observations: finding · quantity · variable · definition · key-term — grounded in the full text
findingForward masking weakened as the interval between the noise burst and the probe tone grew at both recording sites, but the decline was more abrupt in the inferior colliculus than in the cochlear nucleus.
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.findings[0]
findingBackward masking in the inferior colliculus took three forms: "on" neurons with a long latency to the probe tone (6 units), neurons inhibited by the noise burst (3 units), and "off" neurons (2 units).
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.findings[1]
findingA unit produced backward masking only when its latency to the probe tone exceeded the 20 msec at which the noise burst's own response arrived, so units responding within 20 msec showed none.
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.findings[2]
findingThe single-neuron curves relating amount of masking to masking interval followed the same trends as the published psychophysical masking data of Elliott and Pickett, although individual neurons differed from one another.
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.findings[3]
findingOnly a small proportion of inferior collicular units showed backward masking at all.
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.findings[4]
findingFast-adapting neurons form the overwhelming majority of neurons in the inferior colliculus.
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.findings[5]
quantity36 — number of inferior collicular neurons tested for backward masking, of which 11 showed it in three modes
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.quantities[0]
quantity6 units; 3 units; 2 units — how the 11 backward-masking units divided across the long-latency "on", noise-inhibited, and "off" modes
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.quantities[1]
quantitymore than 20msec / 10msec — the unit's response latency to the probe tone inside the backward-masking region versus its latency to the noise burst
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.quantities[2]
quantity14.5msec at-30dB — measured response latency at 3,500 Hz at the highest of four tested intensities, the shortest of the reported latency shifts
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.quantities[3]
variablemasking interval (independent)
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.variables[0]
variableamount of masking (dependent)
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.variables[1]
variablestimulus intensity in dB (independent)
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.variables[2]
definition"off" type neuron
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.definitions[0]
Concepts
terms this paper carries, each with the sentence it was cut from — the layer that joins one paper to another. Terms with no quote yet are on CONCEPTS.html.
conceptsimultaneous masking — not defined in this paper's own words; DEFINED BY TIMING ALONE: 'the situation in which masked and masking stimuli are presented CONCURRENTLY.' A terminology-fixing sentence - the kind that does the corpus's work for it - and the definition mentions no mechanism, which is what lets the paper then go looking for one
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
concepts[0]
concepttemporal masking — not defined in this paper's own words; masker and probe NOT overlapping in time, so nothing peripheral need be shared. The paper's bet is that this one is central: 'it is assumed that temporal masking may be related to the neural mechanisms in the higher auditory system' - an assumption at the start, and the recordings are the test of it
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
concepts[1]
conceptbackward masking — not defined in this paper's own words; a masker AFTER the probe, which cannot work by overlapping it. Located by an absence: 'may involve central processes because it was not demonstrable in the cochlear nucleus.' This is the tool marcel1983 uses twelve years later to make a prime unreportable - the corpus now holds the instrument and the physiology of it
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
concepts[2]
conceptcochlear nucleus — not defined in this paper's own words; the first central relay of the auditory pathway, and here it functions as a boundary marker rather than a subject: what appears there can be peripheral, what does not must be further up. A recording site used as a place to draw a line
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
concepts[3]
Statistics — cross-field join keys
field-invariant statistical terms, used in their statistical sense (gated on a number / symbol / test). A p-value or a standard deviation means the SAME thing in physics, biology, psychology and sociology — so these are the strongest cross-field join keys. Grounded verbatim.
histogram as written: stimulus time (PST) histograms
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[0]

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