Basic Informations

C.V

Name : Amr Sayed Ramadan Hussein
Job: Lecturer in Hearing Disabilities dep
Faculty : Faculty of Sciences of Special Needs
University: Beni-Suief University
Date of birth : 19/2/1981
Work Adress: Beni-Suief Governrate- Beni-Suief University- Faculty Of Sciences of Special Needs - East Nile

Master Title

The Impact Of Nocturnal Sleep Deprivation : ( Deep – Light ) On Some Cognitive Functions And Brain Mechanisms Of The Orphanage Inhabitant Students In Assiut :A Psycho-Physiological Study.

Master Abstract

The current study aimed at examining the effect of nocturnal sleep deprivation (deep- light) on some cognitive functions of: declarative memory, Reaction time, and on the work of the brain during the process of retrieval for verbal task that has been learned, in a sample of 20 male students ,aged (13-19 years) , residents of the orphanage. The researcher prepared lists of paired-associate words; To measure the retrieval of the declarative memory, and used a Reaction time task; to measure reaction time which include some cognitive processes include: attention and decision-making, and Single Photon Emission Computed Tomography (SPECT); to measure physiological activity that accompanies the process of retrieval. The experimental design composed of four sleep statuses: A normal sleep, a Total sleep deprivation, a deep sleep deprivation, and a light sleep deprivation. The researcher has used Non-Parametric Statistics for the study. The study found that there are statistically significant differences at the level of 0.01 for retrieval among the four statuses, in favor of normal sleep. The study also showed that there aren’t statistically significant differences in simple reaction time among sleep statuses. The results showed that there are statistically significant differences at the level of 0.005 at discrimination reaction time among sleep statuses, in favor of normal sleep, It showed , also , significant difference at the level of 0.0001 at multiple –choice reaction time among sleep statuses in favor of normal sleep. These results is evident that the more difficult the task, the more effect of sleep deprivation on task performance. The study found differences in brain regions that are responsible for retrieval according to the type of sleep and the level of retrieval .The results showed, in the case of normal sleep, that Temporal Lobes - left and right - showed high activity during retrieval of verbal information. In cases of sleep deprivation, the results indicated the presence of high activity in the frontal and Parietal lobes - left and right - in the case of high retrieval, while these same areas showed low activity in the case of low retrieval, and the Temporal lobes didn’t show remarkable activity in the three statuses of deprivation, either performance is high or low, except in high performance in deprivation of light sleep. Better performance – also- associated with high activity in Thalamus. This shows competence of temporal lobes on verbal information retrieval in the left and right sides in the case of normal sleep, but in cases of sleep deprivation frontal and parietal lobes -left and right – perform a compensatory process during retrieval to compensate lack of temporal lobe activity for individuals who have high intelligence . The association between better performance and the activity in Thalamus shows that Thalamus plays a critical role in the integration of sensory information which transfer to the cerebral cortex , that lead to recall of information. The results also found that there were no statistically significant differences in brain activity between left and right sides of the brain in the four lobes, this shows the integration of the brain during retrieval of declarative memory.

PHD Title

The effectiveness of a training program based on Mirror Neuron System on developing attention for deaf students: A laboratory and Psych-Physiological study

PHD Abstract

The study aimed at knowing the effectiveness of a computerized training program based on tasks require activation of brain regions especially Mirror Neuron System (MNS) on improving attention of deaf students. In additions, to determine whether these regions (MNS) will be activated after training during performing attention tasks or not. The father population consisted of 364 deaf students (males- females) from the preparatory and secondary stages in AL Amal schools (Males–females) in Assiut city. 125 students were excluded after applying exclusion criteria. There were two preliminary samples: one for behavioral tools (n =70) students and the other for laboratory tools (n=49) students. The samples were selected with Multi-stage Stratified random way. The laboratory sample consisted of 5 male students. The main sample consisted of 109 deaf students divided into two groups: control group consisted of 49deaf students: (23 preparatory”12 male -11 female, mean= 17.4, SD=1.79, 26 secondary”13 male-13 female, M=19.2, SD=1.95) and Experimental group; consisted of 60 deaf students (27 prep.”13 male – 14 female” M=17.9, SD=1.86, 33 secondary “17 male- 16 female” M=19.5, SD=1.87. The tools were: The Computerized Program for Attention Training (CPAT): includes tasks require activation of brain regions, specifically MNS, during performing these tasks. It consisted of (20) tasks, 42 sessions, each session 1 hour. Attention Network Test (ANT): a computerized test for measuring attention Components: Alertness, Orientation, and Executive control to test the improvement of attention components after training. The Modified attention network test (MANT): for testing attention components during Functional Magnetic Resonance Imaging (fMRI) imaging. Functional Magnetic Resonance Imaging (fMRI): to determine the activation of brain regions during performing attention tests before and after training. The results showed that: There were significant differences 0.01 on: Alertness, Orientation, executive control, full attention and its accuracy between control and experimental groups on posttest in favor of the experimental group. There were significant differences 0.01 on: Alertness, Orientation, executive control, full attention and its accuracy between pretest and posttest of the experimental group in favor of posttest. There were no significant differences between posttest and follow-up test of the experimental group. There were no significant differences on: Alertness, Orientation, executive control, full attention and its accuracy whether between males and females or between students in preparatory and secondary stages .Brain imaging results show mirror neuron system (MNS) regions activated more obviously on ANT posttest than ANT pretest. These regions include: Broca’s area, intra-parietal sulcus, supra-marginal gyrus, primary and supplementary motor areas, and fronto-parietal regions Brain regions related to attention components were more active during posttest rather than pretest. These results confirm that, the more engagement on tasks depending on brain training, the better performance on cognitive aspects. The brain regions that are included on training tasks would be activated during performing the developed cognitive aspects.