Purpose: The present study which addressed adults who stutter (AWS), has been an attempt to investigate power spectral dynamics in stuttering state through answering the written questions using quantitative electroencephalography (qEEG).Materials and Methods: A 64-channel EEG setup was used for data acquisition in 9 AWS. Since speech, and especially stuttering, causes significant noise in the EEG, the three conditions of speech preparation (SP), imagined speech (IS), and simulated speech (SS) in a 7-band format were chosen to source localize the signals using the standard low-resolution electromagnetic tomography (sLORETA) tool in fluent and disfluent states. Results: Having extracted enough fluent and disfluent utterances, significant differences were noted. Consistent with previous studies, the lack of beta suppression in SP, especially in beta2 and beta3 and somewhat in gamma band, was localized in supplementary motor area (SMA) and pre motor area in disfluent state. Delta band frequency was the best marker of stuttering shared in all 3 experimental conditions. Decreased delta power in SMA of both hemispheres and right premotor area through SP, in fronto-central and right angular gyrus through IS, and in SMA of both hemispheres through SS were a notable qEEG features of disfluent speech. Conclusion: The dynamics of beta and delta frequency bands may potentially explain the neural networks involved in stuttering. Based on the above, neurorehabilitation may better be formulated in the treatment of speech disfluency, namely stuttering.

<b><i>Introduction:</i></b> Feeding is an interactive process between a child and a caregiver, and its early and chronic problems can affect the stress and quality of life of parents. Since the health and support of caregivers can affect the child’s disability and performance, it is important to consider the impact of feeding and swallowing disorders on caregivers. Hence, the present study aimed to translate and investigate the validity and reliability of the Feeding/Swallowing Impact Survey (FS-IS) in Persian. <b><i>Methods:</i></b> This methodological study consisted of two phases: translating the test to Persian (P-FS-IS) and evaluating psychometric properties including face and content validity (through experts’ opinions and cognitive interviews), construct validity (by known-group validity and exploratory factor analysis), and reliability of the questionnaire (by internal consistency and test-retest reliability). The present study was performed on 97 Iranian mothers of children with cerebral palsy aged 2–18 years with swallowing impairments. <b><i>Results:</i></b> Exploratory factor analysis rendered two factors with a cumulative variance of 59.71%. When evaluating known-group validity, the questionnaire scores were significantly different across the groups with different severity of the disorder (F(2, 94) = 57.1, <i>p</i> ≤ 0.001). P-FS-IS had a high internal consistency with Cronbach’s alpha of 0.95, and there was an appropriate intra-class correlation coefficient of 0.97 for the total questionnaire. <b><i>Conclusion:</i></b> P-FS-IS has good validity and reliability and is a suitable questionnaire for assessing the impact of pediatric feeding and swallowing disorders on Persian language mothers. This scale can be used in research and clinical settings to evaluate and determine therapeutic goals.