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Full-Text Articles in Life Sciences
Dynamic Range Of Frontoparietal Functional Modulation Is Associated With Working Memory Capacity Limitations In Older Adults, Jonathan G. Hakun, Nathan F. Johnson
Dynamic Range Of Frontoparietal Functional Modulation Is Associated With Working Memory Capacity Limitations In Older Adults, Jonathan G. Hakun, Nathan F. Johnson
Physical Therapy Faculty Publications
Older adults tend to over-activate regions throughout frontoparietal cortices and exhibit a reduced range of functional modulation during WM task performance compared to younger adults. While recent evidence suggests that reduced functional modulation is associated with poorer task performance, it remains unclear whether reduced range of modulation is indicative of general WM capacity-limitations. In the current study, we examined whether the range of functional modulation observed over multiple levels of WM task difficulty (N-Back) predicts in-scanner task performance and out-of-scanner psychometric estimates of WM capacity. Within our sample (60–77 years of age), age was negatively associated with frontoparietal modulation range. …
Subcutaneous Neurotophin 4 Infusion Using Osmotic Pumps Or Direct Muscular Injection Enhances Aging Rat Laryngeal Muscles, Richard D. Andreatta, Joseph C. Stemple, Tanya S. Seward, Colleen A. Mcmullen
Subcutaneous Neurotophin 4 Infusion Using Osmotic Pumps Or Direct Muscular Injection Enhances Aging Rat Laryngeal Muscles, Richard D. Andreatta, Joseph C. Stemple, Tanya S. Seward, Colleen A. Mcmullen
Physical Therapy Faculty Publications
Laryngeal dysfunction in the elderly is a major cause of disability, from voice disorders to dysphagia and loss of airway protective reflexes. Few, if any, therapies exist that target age-related laryngeal muscle dysfunction. Neurotrophins are involved in muscle innervation and differentiation of neuromuscular junctions (NMJs). It is thought that neurotrophins enhance neuromuscular transmission by increasing neurotransmitter release. The neuromuscular junctions (NMJs) become smaller and less abundant in aging rat laryngeal muscles, with evidence of functional denervation. We explored the effects of NTF4 for future clinical use as a therapeutic to improve function in aging human laryngeal muscles. Here, we provide …