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Biomedical subjects

P Zoccolotti

Publications and source records attributed to P Zoccolotti.

44 records · Page 3Linked to original sources
PubMed1982

Perinatal factors in hand and eye preference: data from the Collaborative Perinatal Project.

Data from 5,899 girls and boys who participated in the NIH Collaborative Perinatal Project were analyzed for relationships between birth order and birth stress and hand and eye preference as measured at age seven. None of the birth variables were significantly related to hand preference at the 0.05 level for either boys or girls. However, left eye preference was related to birth stress in boys. When both sexes were combined, left eye preference was also associated with low and high birthweight, and also with right lateral position of the head in the maternal pelvis.

Apgar Score↗
PubMed1981

Sex and cognitive influence on visual hemifield superiority for face and letter recognition.

Two groups of field independent individuals (one M and one F) and two groups of field dependent individuals (one M and one F) were selected as subjects in the experiment. The classification of field dependence-independence was based on predetermined RFT and EFT standards. The subjects, all right-handed, were given a face and a letter recognition task in a tachistoscopic visual hemifield paradigm; reaction time with either hand was the dependent measure. field independent subjects of both sexes showed a clear right-field superiority for letter and a left-field superiority in both letter and face recognition, although of a smaller magnitude than the previous group. The results of the experiment do not support previous findings of no field superiority in females for face recognition; on the contrary, they provide additional evidence that measures of cognitive style significantly predict hemispheric specialization.

Adult↗
PubMed1979

Body perception in athletes and non-athletes.

20 male athletes and 20 control subjects were required to make estimates of the length of their body dimensions and of external comparison objects. Athletes were more accurate in judging body dimensions than comparison objects while the reverse pattern was demonstrated by non-athletes. The results are discussed on the basis of the possible influence of sports activities on body perception.

Adolescent↗
PubMed1979

Hemispheric superiorities on a unilateral tactile test: relationship to cognitive dimensions.

Subjects, 30 male and 30 female, were administered a unilateral tactile test, which requires the subject to judge line orientations. More field-independent individuals in the sample perceived line orientation significantly more accurately with their left hand than with their right hand, while more field-dependent individuals showed no significant lateral difference. However, a similar pattern was observed when a verbal comprehension measure was used as a criterion. The results are discussed as they relate to the hypothesis of a link between psychological differentiation and cerebral specialization.

Dominance, Cerebral↗
PubMed1978

Field dependence and lateralization of verbal and configurational processing.

With tachistoscopic presentation, relatively field-dependent 18- to 30-year-old males were found to show a significant right-visual-field advantage in reaction-time in a letter discrimination task, while relatively field-dependent subjects did not show a significant hemifield difference. In a second study, relatively field-independent 18- to 30-year-old males again showed a significant right-visual-field superiority in reaction time to letter discrimination, and in addition showed a significant left-visual-field superiority in tachistoscopic face discrimination, while relatively field-dependent subjects showed no significant hemifield difference on either task. The results are interpreted as indicating a link between Witkin's concept of psychological differentiation and differentiation at the neural level, as manifested by specialization of function of the cerebral hemispheres.

Adolescent↗
PubMedDate not supplied

Field dependence, laterality and the EEG: a reanalysis of O'Connor and Shaw (1978).

O'Connor and Shaw (1978) investigated the relationship between field-dependence-independence (taken as a measure of cognitive organization), handedness strength (taken as a measure of functional organization), and resting EEG coherence spectra in the alpha band (taken as a measure of cortical organization). All three variables were found to be significantly interrelated in the right-handed as well as the left-handed subsample. However, some inconsistencies in the original report suggested the need for reanalysis of the data. The results of that reanalysis are presented here. When a mean unsigned error was used as score for the Rod and Frame Test, more field-independent subjects consistently showed lower EEG coherence spectra than more field-dependent subjects. Also, both right-handed and left-handed field-independent individuals tended to show a stronger degree of handedness in the direction of their lateral preference than field-dependent subjects, indicating that a more field-independent approach is associated with greater specialization irrespective of the direction of lateral preference.

Alpha Rhythm↗
PubMedDate not supplied

[Disorders of autonomic responses to emotional stimuli in patients with unilateral hemispherical lesions].

The authors have studied in 31 patients affected by right (N = 12) or left (N = 19) hemispheric lesions and in 10 normal controls the autonomous response to emotional stimuli. Stimuli consisted of 3 short films, aiming to provoke respectively a negative emotional reaction, a positive emotional response or a non-emotional reaction. Galvanic skin response and heart rate were considered as the dependent variables of our research. Both normal controls and left brain-damaged patients were very influenced by the emotional nature of the stimuli and showed clear signs of activation of the sympathetic and para-sympathetic systems in front of emotional films. By contrast, right brain-damaged patients were not influenced by the emotional or non-emotional nature of the stimuli and showed neither a clear galvanic skin response nor a significant decrease of heart rate in front of emotional films.

Brain Diseases↗