Neuroscientist Andrew Newberg (U of Pennsylvania) is doing major research in this area. See his books here - http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Daps&field-keywords=andrew+newberg
U of Montreal neuroscientist Mario Beauregaard is working in the area of spirituality and neuroscience - http://www.amazon.com/Spiritual-Brain-Neuroscientists-Case-Existence/dp/0061625981/ref=sr_1_3?s=books&ie=UTF8&qid=undefined&sr=1-3&keywords=mario+beauregard
Candy Brown, prof. of religious studies at Indiana University, is working in areas of science and prayer - see her book Testing Prayer; see also here - http://www.docvadis.es/jorge-cordero/document/jorge-cordero/estudio_de_los_efectos_terap_uticos_de_la_oraci_n_de_intercesi_n_proximal_en_discapacidades_auditiva_y_visual_en_la_zona_rural_de_mozambique/fr/metadata/files/0/file/Study_of_the_Therapeutic_Effects_of_Proximal.5.pdf
And, I recently read The Psychology of Prayer: A Scientific Approach - esp. chs. 6 and 7.
Finally, New Testament scholar Joel Green is working in the area of neuroscience - see his excellent book Body, Soul, and Human Life.