In the past children and adolescents with emotional problems and/or documented evidence of brain damage have often been systematically omitted from samples used for research exploring the elusive topic of learning disabilities. Previous conceptualizations of LD and attempts to define the same may have been premature in forming these exclusionary criteria. The purpose of this study was to employ psycho-educational, neuropsychological and socio-behavioral (Conners Rating Scale) variables in determining if definable subtypes exist within a diverse population of LD and overtly brain-damaged subjects.The 95 subjects selected had been referred for neuropsychological assessment at a large Midwestern medical center. The mean age of the sample was 10.6 yrs.; mean FSIQ = 102. Medically confirmed brain damage was documented for 45% of the sample.Cluster analysis which included behavioral data revealed 4 interpretable clusters. The largest segment (51%) of learners functioned within normal limits on all measures but demonstrated relatively stronger nonverbal than verbal skills. The second group (20%) was within normal limits on all psycho-educational and behavioral measures but demonstrated marked sensory deficits. A third and much smaller group (9%) was distinguished by its younger average age, high percentage of documented brain damage (75%), and clinically elevated levels of inattentiveness. The fourth group (20%) demonstrated both the poorest VIQ and achievement scores as well as significant problems with hyperactivity, inattentiveness, and conduct disorder.For comparison a second cluster analysis based on only psycho-educational and neuropsychological variables was calculated and yielded 2 interpretable clusters. The first subtype was the younger of the 2 groups and demonstrated stronger language skills. The second subtype, the older of the two, showed stronger nonverbal skills. Neither subgroup demonstrated clinically elevated behavioral concerns. The inclusion of behavioral variables within the cluster analysis would thus seem to be an important component in subtyping of subjects with learning difficulties.In neither of the cluster solutions (including or excluding behavior) was a cluster formed consisting exclusively of either BD or LD subjects. Percentages of BD in the analysis which included behavior ranged from 36% of the subjects in Group 2 to 75% of the subjects in Group 3. These findings are supportive of those of Arffa et al. (1989) and contribute to the notion that parallels may exist in cerebral function and/or structure between the LD and BD classifications. / Department of Educational Psychology

The primary purpose of this study was to clarify the underlying principles of singers' resonance and to examine some of the pedagogical practices associated with the traditional schools of singing and contemporary voice science. The secondary purpose was to determine which principles should be retained, discarded, or altered.An examination of the voice pedagogy literature revealed recurrent references to resonance. This implied that the concept is of some importance to voice pedagogy. Singers' resonance has, however, been presented in diverse contexts indicating that (1) it has a number of denotations and connotations, (2) it is sometimes used ambiguously, or inaccurately, and (3) a further investigation of the topic might yield clarity to the field of voice pedagogy.It was determined that though there are many important voice pedagogy methodologies, classically trained professional concert and opera singers of international reputation are taught to optimize singers' resonance both in order to be heard and to produce the accepted tone. It was found that those precepts which are based upon acoustic laws should be conserved and those which are not should be abandoned, altered, or when appropriate, acknowledged as metaphorical. / School of Music

Access to abstract permanently restricted to Ball State community only / Access to thesis permanently restricted to Ball State community only / School of Physical Education, Sport, and Exercise Science

No description available.

The weekly time course of adaptation of Heart rate variability (HRV) and respiratory sinus arrhythmia (RSA) characteristics were examined over 4-weeks of intensive endurance training in 17 sedentary subjects (35.8 +/- 10.0 yrs). Five-minute ECG and breathing recordings were obtained at rest at spontaneous breathing (SP) and at paced breathing rates of SP+4 (M4) and SP-4 (P4) breaths/minute. Spectral power components of HRV were computed from the RR interval sequences; amplitude and phase of RSA were computed from the sinusoid fitted to the instantaneous heart rate within each breath. RSA sensitivity was obtained from the slope of the RSA amplitude versus breathing frequency relationship. Four weeks of training caused significantly increased in VO2max (37.3 +/- 4.4 versus 40.0 +/- 5.4 ml/kg/min; (p < 0.01); a significant decrease in DBP (p < 0.001); a slight decrease in SBP (p < 0.08), and max HR slightly decreased (P < 0.06). None of these variables were changed significantly in control subjects. No change in resting HR was found after training (74 +/- 14 versus 74 +/- 7 bpm). Pre versus post-training results in total and high frequency spectral powers (ms2) of HRV taken at SP were as was RSA amplitude. A significant reverse correlation was found between RSA-amplitude and breathing frequency (r = 0.40). Results suggest a trend towards an increased gain in the amplitude of RSA for varying breathing frequencies after training. In conclusion, four weeks of intensive endurance training may significantly increase maximal aerobic power and provide some health related benefit such as a decrease in diastolic pressure, without concurrent changes in resting heart rate or its modulation by cardiac vagal activity.

Alcohol abuse/dependence frequently co-occurs with antisocial personality disorder (ASPD) and conduct disorder (CD). Furthermore, crime studies have generally found that alcohol is involved in over 50% of violent crimes, and experimental studies support the notion that acute alcohol consumption indirectly increases the likelihood of aggressive and disinhibited behaviors in the laboratory. However, the mechanisms underlying alcohol's association with such behaviors remain unclear. The goals of this thesis were therefore to further elucidate potential mechanisms underlying (a) alcohol-induced aggressive, disinhibited behaviors and (b) the high comorbidity between delinquent, aggressive behaviors (characterizing CD/ASPD) and alcohol misuse/abuse/dependence. Thus, four studies were conducted, focusing on individual differences in the physiological response to alcohol intoxication. Specifically examined was the elevated heart rate (HR) response to alcohol, which is thought to reflect an increased sensitivity to alcohol-induced reward. / Results of Study I indicated that high HR Responders to alcohol self-reported increased multiple year delinquency (physical aggression, theft, and destruction of property), as well as more alcohol consumption and an increased positive subjective feeling following intoxication, as compared to low HR Responders. Furthermore, a high HR response was related to increased extraversion, disinhibition, boredom susceptibility, and total sensation seeking. Study II revealed that Aggressive Sons of Male Alcoholics (Agg-SOMAs) had the highest intoxicated HR response, and reported the most alcohol consumption, as compared to Non-Agg-SOMAs, or Agg - or Non-Agg - Non-SOMAs. Studies III and IV revealed that intoxicated high HR responders exhibited the most physical aggression (assessed by the Taylor Aggression Paradigm), as well as the most behavioral disinhibition (assessed by the Go/No-Go task) as compared to sober high HR Responders, or sober/intoxicated low HR responders. / In summary, individuals with a high HR response to alcohol appear to have an increased propensity for multiple addictive, disinhibited and aggressive behaviors. This determines a phenotype of both potential heuristic and clinical importance. These findings are discussed within the context of a hypothetical model of (a) the high comorbidity between alcohol use/misuse and aggression/ASPD, and (b) the increased likelihood of alcohol-induced aggressive, disinhibited behaviors.

Humans can only survive the low barometric pressure of altitudes above 6000m by making a complex series of adaptations. The energetics of human survival at such extreme altitudes have not been widely studied. Objectives were to compare the doubly labelled water (DLW) and intake-balance (IB) methods to estimate daily energy expenditure while climbing between 6000 and 8046m and to investigate the putative metabolic cost involved with the process of acclimatization to extreme altitude. Reliability of the DLW method to provide an accurate and portable means to measure human energy expenditure depends upon a series of assumptions regarding the flux of tracer and tracee across the physiological compartments of measurement. Additional objectives were to review and examine the proficiency of these assumptions to account for perturbations experienced while using DLW while climbing at extreme altitude. Findings suggest that the use of DLW at extreme altitudes requires special consideration towards elevated rates of fractional isotope loss, inter-subject isotope transfer, alterations in total body water, changes in background isotopic abundance, and choice of sampling technique. Revised strategies directed at achieving these aims are calculated. Results from extreme altitude indicate that IB and DLW techniques each provide similar estimates of group mean energy expenditure despite substantial changes in body weight and composition and that the metabolic cost for the process of acclimatization accounts for roughly 12% of total daily energy expenditure. Problems associated with maintaining energy balance while climbing at extreme altitude are related to low energy intakes, approximately only 70% of energy demands, and energy expenditure values that are comparable to those of highly trained endurance athletes at sea-level.

Glucose is a principle precursor for milk lactose and de novo synthesis of milk fat; therefore exercising during lactation could create competition for glucose between exercising muscle and lactating mammary gland. This study investigated the combined effects of maternal dietary glucose (20%, 40%, 60%), exercise (chronically exercised, sedentary) and litter size (8, 12 pups) on rat mammary gland composition, milk composition, milk yield and pup growth. Chronic exercise increased milk fat concentrations and an interaction between chronic exercise and 20% dietary glucose decreased milk lactose concentrations compared to 40% or 60% glucose diets. Restricting maternal dietary glucose also decreased milk fat concentrations and exercise decreased mammary fat. In addition, pups of dams fed the 40% glucose diet were heavier on lactation day 15 than pups of dams fed the 60% diet. These results suggest that competition for glucose occurs and that a 40% glucose maternal diet may be more appropriate for pup growth.

This work surveys currently available methods for measuring human brainwaves in order to generate music and technologies for real-time transmission of audio and music over the Internet. The end goal is to produce a performable music system which sends live human brainwaves over the Internet to produce sounding music at another, physically separated location.

It has been argued that patients with frontal lobe lesions are impaired in temporal context memory and, more generally, in retrieving the source of one's knowledge or ideas. Furthermore, it has been speculated that a failure to retrieve source information may result in an increased susceptibility to distortions of episodic memories in patients with frontal lobe lesions. The precise role of the frontal cortex, however, in source or episodic retrieval is not clear. Does this region of cortex play a primary role or a secondary, executive role in the processing of such memories? Studies of patients with temporal lobe lesions have also shown impairments in episodic memory, including difficulties in the retrieval of source information. An important issue, therefore, is whether these two brain regions make different contributions to the processing of source information and to the retrieval of episodic memories. / In the present experiments, patients with unilateral excisions restricted to frontal cortex or to the anterior temporal lobe were compared on various tasks examining source memory performance and the accurate retrieval of episodic information. The results of these studies failed to support the general contention that patients with frontal cortex excisions have source (or temporal context) memory impairments. Instead, differences between these patients and normal control subjects appeared to be contingent on whether strategic organizational or control processes were necessary for efficient processing of episodic information. The memory of patients with left temporal lobe excisions, on the other hand, was significantly impaired for both content and source information in most tasks. Furthermore, these subjects showed high rates of inaccuracies and distortions of memory. The false memories of this patient group were attributed to a combination of their poor memory for the specific items of the task and their over-reliance on semantic "gist" or on inferential knowledge about the events. Patients with right temporal lobe excisions were generally less severely impaired on the verbal memory tasks compared with those with left-sided lesions, but were impaired in their memory for the contextual aspects of an event.