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Lin JN, Herron J, Andrade JD, Brizgys M. Characterization of immobilized antibodies on silica surfaces. IEEE Trans Biomed Eng 1988; 35:466-71. [PMID: 2840385 DOI: 10.1109/tbme.1988.1502030] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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52
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Andrade JD, Herron J, Lin JN, Yen H, Kopecek J, Kopeckova P. On-line sensors for coagulation proteins: concept and progress report. Biomaterials 1988; 9:76-9. [PMID: 3280041 DOI: 10.1016/0142-9612(88)90074-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The assessment of blood damage and of the activation of the coagulation, complement and/or inflammatory systems by cardiovascular and extracorporeal devices is difficult at best. Immunoassay methods are now available for the measurement of many of the proteins, enzymes and peptides involved in coagulation, thrombosis, complement and inflammation. We present a long-range project and plan to develop an array of remote, on-line, semicontinuous immunosensors for selected coagulation proteins, based on fluoroimmunoassay principles. The free/bound separation step is performed optically. Excitation of fluorescence is performed via an evanescent wave produced by total internal reflection and waveguide optics. Fluorescence emission is collected only in the near field. Means to deliver fluorescently-labelled reagent and to modify the antigen-antibody binding constant are presented and discussed. The results of non-specific binding, plasma-blood fluorescence, and blood compatibility are also discussed.
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Roman IJ, Kassem N, Gural RP, Herron J. Suppression of histamine-induced wheal response by loratadine (SCH 29851) over 28 days in man. ANNALS OF ALLERGY 1986; 57:253-6. [PMID: 2945499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Five groups of 12 healthy volunteers each received in double-blind, randomized fashion oral b.i.d. doses of 10, 20, or 40 mg loratadine, 12 mg chlorpheniramine maleate (CTM), or placebo for 28 days. Histamine and saline were injected intradermally into opposite arms at baseline and at specified times following treatment on days 1, 3, 7, 14, 21, and 28. Notable suppression of adjusted wheal formation (histamine-induced minus saline-induced) occurred within two hours after the first dose of each active treatment on day 1. In general, throughout the treatment period, suppression of adjusted wheal formation by all doses of loratadine was significantly greater than by placebo. Suppression by 10 mg loratadine was comparable to CTM, and 20 and 40 mg loratadine were significantly greater than CTM. Suppression of wheal formation by loratadine during the treatment period and during five days posttreatment were dose related. The continued effectiveness of loratadine throughout the 28 days suggests that tolerance to loratadine did not develop in this study. Sedation occurred in 8 of 12 subjects receiving CTM, 1 of 12 receiving 10 mg loratadine, and 1 of 12 receiving placebo.
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Fein G, Galin D, Yingling CD, Johnstone J, Davenport L, Herron J. EEG spectra in dyslexic and control boys during resting conditions. ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY 1986; 63:87-97. [PMID: 2417821 DOI: 10.1016/0013-4694(86)90001-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We studied the resting eyes open and eyes closed EEG in carefully screened samples of 9-13-year-old dyslexic and control boys within a 2-cohort cross-validation design with repeat testing 1-3 years later. We found: no difference between groups in delta or theta activity in either cohort or in repeat testing 1-3 years later; in the dyslexics, decreased beta (19-24 c/sec) activity at bilateral central, parietal and mid-temporal leads referenced to vertex; inconsistent group differences in the alpha band: the first cohort dyslexics had lower alpha power than did the controls, but there was no group difference in the second cohort; and significant relative delta differences between groups in the first cohort, which were shown to be a statistical artifact of the use of relative power. We conclude that: dyslexia per se is not associated with increased absolute power in the delta and theta bands; lower power in the high beta band is reliably found in these samples of dyslexics without other disorders; and alpha power levels are not consistently lower in the dyslexic group.
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Johnstone J, Galin D, Fein G, Yingling C, Herron J, Marcus M. Regional brain activity in dyslexic and control children during reading tasks: visual probe event-related potentials. BRAIN AND LANGUAGE 1984; 21:233-254. [PMID: 6704700 DOI: 10.1016/0093-934x(84)90049-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Event-related potentials (ERPs) elicited by task-irrelevant visual stimuli were recorded from 34 control and 32 dyslexic 10- to 12-year-old boys while they performed silent and oral reading at two levels of difficulty. All subjects were extensively screened for neurological problems, IQ, and sensory acuity. Specific features of the ERPs were affected in amplitude and latency by the experimental variables: group membership, oral vs. silent reading, difficulty level, and recording site (within and between hemispheres). A specific effect of difficulty on the central and parietal ERP was seen in the dyslexics but not the controls. Different patterns of asymmetry were found for the two groups in silent vs. oral reading at midtemporal placements. A marked asymmetry (R greater than L) was found at the midtemporal region for both groups.
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Brown B, Haegerstrom-Portnoy G, Yingling CD, Herron J, Galin D, Marcus M. Dyslexic children have normal vestibular responses to rotation. ARCHIVES OF NEUROLOGY 1983; 40:370-3. [PMID: 6601943 DOI: 10.1001/archneur.1983.04050060070013] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
We examined the rotational vestibular responses of carefully screened dyslexic and control populations (34 dyslexics and 33 controls). The subject groups had equivalent performance IQs but differed significantly on verbal IQ and on silent and oral reading. Children with significant neurologic, visual, or hearing deficits were excluded. We measured eye movements provoked by sinusoidal rotation of the subjects (in total darkness) at low frequencies (0.01 to 0.16 Hz). Gain, phase, and preponderance (asymmetry) of the responses were calculated from the eye velocity and stimulus velocity waveforms. There were no differences between the groups in any of these measures. We conclude that there are no clinically measurable differences in this aspect of vestibular function in our carefully selected populations of dyslexic and control children.
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Brown B, Haegerstrom-Portnoy G, Yingling CD, Herron J, Galin D, Marcus M. Tracking eye movements are normal in dyslexic children. AMERICAN JOURNAL OF OPTOMETRY AND PHYSIOLOGICAL OPTICS 1983; 60:376-83. [PMID: 6881265 DOI: 10.1097/00006324-198305000-00006] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We measured saccadic and smooth eye tracking movements in 34 dyslexic and 35 control subjects and were unable to show differences in any of the tasks or parameters measured. Subjects were carefully screened for neurological, optometric, audiological, and behavioral problems before admission to the study. We suggest that differences between our results and those of previous investigators are based on sampling differences. We conclude that while there may be children with reading disorders secondary to visual or oculomotor deficits, dyslexia can and does exist independent of such deficits. Because, in this and other studies, we have ruled out peripheral involvement, we feel that dyslexia is primarily a deficit of central information processing of written or spoken material.
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Brown B, Haegerstrom-Portnoy G, Adams AJ, Yingling CD, Galin D, Herron J, Marcus M. Predictive eye movements do not discriminate between dyslexic and control children. Neuropsychologia 1983; 21:121-8. [PMID: 6866253 DOI: 10.1016/0028-3932(83)90078-7] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Pavlidis has suggested that predictive saccadic tracking eye movements distinguish between reading disabled and normal children. We have examined saccadic eye movement tracking in 34 dyslexic and 33 control subjects, between 10 and 12 yr old. The subjects were equivalent in performance IQ (WISC-R), with differences between verbal and performance IQ of less than 30 points. Children with neurological, visual or auditory deficits or histories of emotional problems and hyperactivity were excluded. There were no differences between the groups on the eye movement tracking task when scored objectively by computerized analysis of the eye movement records, or by ranking of the records by an experienced observer. Our results (and those of other recent studies) fail to support Pavlidis' contention that eye movements hold the key to dyslexia.
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Galin D, Ornstein R, Herron J, Johnstone J. Sex and handedness differences in EEG measures of hemispheric specialization. BRAIN AND LANGUAGE 1982; 16:19-55. [PMID: 7104680 DOI: 10.1016/0093-934x(82)90070-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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60
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Ornstein R, Johnstone J, Herron J, Swencionis C. Differential right hemisphere engagement in visuospatial tasks. Neuropsychologia 1980; 18:49-49-64. [PMID: 7366823 DOI: 10.1016/0028-3932(80)90083-4] [Citation(s) in RCA: 95] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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61
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Herron J. Total management of the patient [proceedings]. THE AUSTRALIAN AND NEW ZEALAND JOURNAL OF SURGERY 1979; 49:521-2. [PMID: 292396 DOI: 10.1111/j.1445-2197.1979.tb05863.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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62
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Herron J, Galin D, Johnstone J, Ornstein RE. Cerebral specialization, writing posture, and motor control of writing in left-handers. Science 1979; 205:1285-9. [PMID: 472745 DOI: 10.1126/science.472745] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
It has been suggested that the inverted hand position of left-handers during writing indicates the left hemisphere of their brain is linguistically specialized and that the writing of these left-handers may be controlled via ipsilateral pathways. Electroencephalograph alpha asymmetry measures at central and parietal leads, as well as dichotic tests, differentiated right-handers from left-handers, but not inverters from noninverters. Electroencephalograph differences between hand posture groups did appear, but only at occipital leads during reading and writing tasks. Regardless of hand posture or speech lateralization, the right central region of the brain is significantly involved in the control of left-handed writing.
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Ornstein R, Herron J, Johnstone J, Swencionis C. Differential right hemisphere involvement in two reading tasks. Psychophysiology 1979; 16:398-401. [PMID: 461670 DOI: 10.1111/j.1469-8986.1979.tb01485.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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64
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Galin D, Johnstone J, Nakell L, Herron J. Development of the capacity for tactile information transfer between hemispheres in normal children. Science 1979; 204:1330-2. [PMID: 451542 DOI: 10.1126/science.451542] [Citation(s) in RCA: 110] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The hypothesis of less direct interaction between hemispheres in young children was supported by a behavioral test. Fabric samples were compared with either the same hand (same hemisphere) or with opposite hands (between hemispheres). Crossed errors were a significantly larger proportion of total errors in 3-year-olds than in 5-year-olds.
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Johnstone J, Galin D, Herron J. Choice of handedness measures in studies of hemispheric specialization. Int J Neurosci 1979; 9:71-80. [PMID: 573245 DOI: 10.3109/00207457909147222] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Left-and right-handers have been reported to differ in lateral hemispheric specialization for cognition. We compared different methods of dividing subjects into handedness groups: preference(a 12-item questionnaire), performance(speed, strength, dexterity), and preference plus performance, and determined which method of handedness classification indicated the greatest group differences on EEG and dichotic measures of lateral specialization. All handedness measures were significantly intercorrelated. These handedness measures were significantly correlated with the dichotic test over the whole population but were significantly correlated with EEG asymmetry only in females. Scoring degree of handedness showed significant relationships to lateral specialization which were not seen when subjects were classified into discrete handedness groups. Ambidextrous subjects performed as well as right- or left-handers on unimanual tasks despite a lack of hand preference. The hand used for writing was shown to be too limited to be used as the sole index of handedness in studies related to cognition.
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66
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Herron J. Free care costly--who pays? TIMES 1978; 19:3. [PMID: 10308009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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67
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Turner R, Mashburn H, Herron J, Collins R, Kaufmann J. Effects of rheumatoid factor and complement on soluble immunoglobulin G complexes: 51CrCl3 labeling and precipitation studies. PROCEEDINGS OF THE SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE. SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE (NEW YORK, N.Y.) 1978; 157:75-8. [PMID: 622376 DOI: 10.3181/00379727-157-39994] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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68
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Galin D, Johnstone J, Herron J. Effects of task difficulty on EEG measures of cerebral engagement. Neuropsychologia 1978; 16:461-72. [PMID: 692858 DOI: 10.1016/0028-3932(78)90069-6] [Citation(s) in RCA: 112] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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69
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Herron J, Raymond M. The value of professional food management service. OH. OSTEOPATHIC HOSPITALS 1975; 19:10-2. [PMID: 10246409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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70
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Herron J. Skin closure with subcuticular polyglycolic acid sutures. Med J Aust 1974; 2:535-6. [PMID: 4610331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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71
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72
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73
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