Biomedical subjects

Miguel A Diego

Publications and source records attributed to Miguel A Diego.

12 recordsLinked to original sources

PubMed2006

Moderate versus light pressure massage therapy leads to greater weight gain in preterm infants.

Sixty-eight preterm infants (M GA=30 weeks) were randomly assigned to a moderate or to a light pressure massage therapy group to receive 15 massages three times per day for 5 days. Behavior state, stress behaviors and heart rate were recorded for 15min before and during the first 15-min therapy session. Weight gain was recorded over the 5-day therapy period. The moderate versus light pressure massage group gained significantly more weight per day. During the behavior observations the moderate versus light pressure massage group showed significantly lower increases from the pre-session to the session recording on: (1) active sleep; (2) fussing; (3) crying; (4) movement; and (5) stress behavior (hiccupping). They also showed a smaller decrease in deep sleep, a greater decrease in heart rate and a greater increase in vagal tone. Thus, the moderate pressure massage therapy group appeared to be more relaxed and less aroused than the light pressure massage group which may have contributed to the greater weight gain of the moderate pressure massage therapy group.

Body Weight↗

PubMed2006

Withdrawn and intrusive maternal interaction style and infant frontal EEG asymmetry shifts in infants of depressed and non-depressed mothers.

The effects of maternal interaction style (intrusive/withdrawn) on the development of brain electrical activity were studied in infants of depressed and non-depressed mothers shortly after birth and again at 3-6 months of age. Infants of depressed mothers exhibited significantly greater relative right frontal EEG activation than infants of non-depressed mothers. Infants of depressed withdrawn mothers exhibited greater relative right frontal EEG activation than infants of depressed intrusive mothers. Furthermore, while infants of depressed mothers with intrusive interaction styles showed a shift towards greater relative left frontal EEG activation from birth to 3-6 months, infants of depressed mothers with withdrawn interaction styles showed a shift towards greater relative right frontal EEG activation.

Brain↗

PubMed2005

Vagal activity, gastric motility, and weight gain in massaged preterm neonates.

OBJECTIVE: Multiple studies have documented an increase in weight gain after 5 to 10 days of massage therapy for preterm neonates. The massaged preterm neonates did not consume more calories than the control neonates. One potential mechanism for these effects might involve massage-induced increases in vagal activity, which in turn may lead to increased gastric motility and thereby weight gain. STUDY DESIGN: The present randomized study explored this potential underlying mechanism by assessing gastric motility and sympathetic and parasympathetic nervous system activity in response to massage therapy (moderate pressure) versus sham massage (light pressure) and control conditions in a group of preterm neonates. RESULTS: Compared with preterm neonates receiving sham massage, preterm neonates receiving massage therapy exhibited greater weight gain and increased vagal tone and gastric motility during and immediately after treatment. Gastric motility and vagal tone during massage therapy were significantly related to weight gain. CONCLUSION: The weight gain experienced by preterm neonates receiving moderate-pressure massage therapy may be mediated by increased vagal activity and gastric motility.

Analysis of Variance↗

PubMed2004

Patterns of brain electrical activity in infants of depressed mothers who breastfeed and bottle feed: the mediating role of infant temperament.

Successful breastfeeding involves a dyadic interaction between a mother and her infant. The present study was designed to examine the association between breastfeeding and temperament in infants of depressed mothers. Seventy-eight mothers, 31 who were depressed, and their infants participated. Depressed mothers who had stable breastfeeding patterns were less likely to have infants with highly reactive temperaments. Multivariate analyses of variances (MANOVAs) showed that infants of depressed mothers who breastfed did not show the frontal asymmetry patterns, i.e., left frontal hypoactivity, previously reported. Moreover, breastfeeding stability, even in depressed mothers, was related to more positive dyadic interactions. Finally, a model was supported, in which the effects of maternal depression on infant feeding are mediated by infant frontal EEG asymmetry and infant temperament. These findings could provide a foundation for developing intervention techniques, employing breastfeeding promotion and support, directed toward attenuating the affective and physiological dysregulation already noted in infants of depressed mothers.

Adult↗

PubMed2004

Massage therapy of moderate and light pressure and vibrator effects on EEG and heart rate.

Three types of commonly used massage therapy techniques were assessed in a sample of 36 healthy adults, randomly assigned to: (1) moderate massage, (2) light massage, or (3) vibratory stimulation group (n = 12 per group). Changes in anxiety and stress were assessed, and EEG and EKG were recorded. Anxiety scores decreased for all groups, but the moderate pressure massage group reported the greatest decrease in stress. The moderate massage group also experienced a decrease in heart rate and EEG changes including an increase in delta and a decrease in alpha and beta activity, suggesting a relaxation response. Finally, this group showed increased positive affect, as indicated by a shift toward left frontal EEG activation. The light massage group showed increased arousal, as indicated by decreased delta and increased deta activity and increased heart rate. The vibratory stimulation group also showed increased arousal, as indicated by increased heart rate and increased theta, alpha, and beta activity.

Adult↗

PubMed2004

Prepartum, postpartum, and chronic depression effects on newborns.

In order to assess the effects of the onset and chronicity of maternal depression on neonatal physiology, eighty pregnant women were assessed for depression during mid-pregnancy (M gestational age = 25.9 weeks) and shortly after delivery. The women were classified as reporting depressive symptoms 1) only during the prepartum assessment; 2) only during the postpartum assessment; 3) during both the prepartum and postpartum assessments; or 4) reporting no depressive symptoms at either the prepartum or the postpartum assessment. Maternal mood and biochemistry were assessed during pregnancy, and the EEG and biochemical characteristics of their 1-week-old infants were assessed shortly after birth. As predicted, the newborns of the mothers with prepartum and postpartum depressive symptoms had elevated cortisol and norepinephrine levels, lower dopamine levels, and greater relative right frontal EEG asymmetry. The infants in the prepartum group also showed greater relative right frontal EEG asymmetry and higher norepinephrine levels. These data suggest that effects on newborn physiology depend more on prepartum than postpartum maternal depression but may also depend on the duration of the depressive symptoms.

Adult↗

PubMed2003

Academic performance, popularity, and depression predict adolescent substance use.

Eighty-nine high school seniors completed a questionnaire on their feelings and activities, including their use of drugs. Adolescents with a low grade point average, high popularity, and high depression were more likely to smoke cigarettes, drink alcohol, and smoke marijuana than were their peers. Cigarette and alcohol use predicted marijuana use, which in turn predicted cocaine use.

Adolescent↗

PubMed2002

Facial expressions and EEG in infants of intrusive and withdrawn mothers with depressive symptoms.

When intrusive and withdrawn mothers with depressive symptoms modeled happy, surprised, and sad expressions, their 3-month-old infants did not differentially respond to these expressions or show EEG changes. When a stranger modeled these expressions, the infants of intrusive vs. withdrawn mothers looked more at the surprised and sad expressions and showed greater relative right EEG activity in response to the surprise and sad expressions as compared to the happy expressions. These findings suggest that the infants of intrusive mothers with depressive symptoms showed more differential responding to the facial expressions than the infants of withdrawn mothers. In addition, the infants of intrusive vs. infants of withdrawn mothers showed increased salivary cortisol following the interactions, suggesting that they were more stressed by the interactions.

Brain↗

PubMed2002

Fetal activity following stimulation of the mother's abdomen, feet, and hands.

Fetal activity during midgestation (M age=19.8 weeks) was studied in response to vibratory stimulation of the mother's abdomen (at the height of the fetal head), foot massage, hand massage, or control condition (no stimulation). Consistent with previous research conducted during midgestation, the fetuses of mothers who received two trials of 3-sec, 60-Hz vibratory stimulation did not show changes in movement. In contrast, the fetuses of mothers who received a 3-min foot massage showed greater movement than the control fetuses. However, stimulating the mother's hand (another highly innervated area) did not increase fetal activity. By late gestation (M age=35.4 weeks), vibratory stimulation resulted in increased fetal activity. These findings replicate previous research indicating that vibratory stimulation to the mother's abdomen does not elicit fetal activity until later in gestation. Furthermore, our findings indicate that stimulating the mothers' feet, but not the hands, can evoke fetal activity in midgestation.

Abdomen↗

PubMed2002

Spinal cord patients benefit from massage therapy.

The present study assessed the effects of massage therapy on depression, functionality, upper body muscle strength and range of motion on spinal cord injury patients. Twenty C5 through C7 spinal cord injury individuals recruited from a University outpatient clinic were randomly assigned to a massage therapy group or an exercise group. Patients in the massage therapy group received two 40-min massage therapy sessions per week for 5 weeks. Patients in the control group practiced a range of motion exercise routine targeting the arms, neck, shoulders, and back 2 times per week for 5 weeks. Although both the massage and exercise group appeared to benefit from treatment, only the massage group showed lower anxiety and depression scores and significantly increased their muscle strength and wrist range of motion.

Adult↗

PubMed2002

Aggressive adolescents benefit from massage therapy.

Seventeen aggressive adolescents were randomly assigned to a massage therapy group or a relaxation therapy group to receive 20-minute therapy sessions, twice a week for five weeks. The massaged adolescents had lower anxiety after the first and last sessions. By the end of the study, they also reported feeling less hostile and they were perceived by their parents as being less aggressive. Significant differences were not found for the adolescents who were assigned to the relaxation group.

Adolescent↗

PubMedDate not supplied

Maternal psychological distress, prenatal cortisol, and fetal weight.

OBJECTIVE: The objective of this study was to examine the effects of maternal psychological distress on estimated fetal weight during midgestation and explore the maternal hypothalamic-pituitary axis and sympathoadrenal dysregulation as potential risk factors for these effects. METHODS: Fetal ultrasound biometry measurements and maternal sociodemographic characteristics, emotional distress symptoms, and first morning urine samples were collected during a clinical ultrasound examination for a cross-sectional sample of 98 women who were between 16 and 29 weeks pregnant. Fetal weight was estimated from ultrasound biometry measurements; maternal emotional distress was assessed using the daily hassles (stress), Center for Epidemiologic Studies-Depression (depression), and State-Trait Anxiety Inventory (anxiety) scales; and urine samples were assayed for cortisol and norepinephrine levels. RESULTS: Correlation analyses revealed that both maternal psychological (daily hassles, depression, and anxiety) and biochemical (cortisol and norepinephrine) variables were negatively related to fetal biometry measurements and estimated fetal weight. A structural equation model further revealed that when the independent variance of maternal sociodemographic, psychological distress, and biochemistry measures were accounted for, prenatal cortisol was the only significant predictor of fetal weight. CONCLUSIONS: Women exhibiting psychological distress during pregnancy exhibit elevated cortisol levels during midgestation that are in turn related to lower fetal weight.

Adult↗