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Neural activities in human somatosensory cortical areas evoked by acupuncture stimulation
Yoo, Seung-Schik,Kerr, Catherine E.,Park, Min,Im, Dong-mi,Blinder, Russell A.,Park, HyunWook,Kaptchuk, Ted J. Elsevier 2007 Complementary therapies in medicine Vol.15 No.4
<P><B>Summary</B></P><P><B>Objectives</B></P><P>To investigate neural representation evoked by acupuncture from human somatosensory cortices, especially from primary (<I>SI</I>) and secondary (<I>SII</I>) somatosensory areas.</P><P><B>Design and setting</B></P><P>Neuroimaging study – Blood-oxygenation-level-dependent (BOLD) functional MRI was performed during acupuncture on <I>LI4</I> (<I>n</I>=12 healthy participants). Sham acupuncture and innocuous tactile stimulation were also applied on the same acupuncture site as control comparisons.</P><P><B>Outcome measures</B></P><P>Responsive neural substrates were visualized and identified based on both individual and group-level surface activation maps.</P><P><B>Results</B></P><P>Discrete regions within the precentral gyrus (area 4) and the fundus of the central sulcus (area 3a) were selectively activated during the real acupuncture stimulation. In <I>SII</I>, the activation was extended in a postero-inferior direction to the fundus of the lateral sulcus.</P><P><B>Conclusion</B></P><P>This specific pattern of acupuncture-related activation indicates that deep tissue stimulation (as seen in area 3a activation) and concurrent processing of sensory stimulation (as seen in activation in <I>SII</I>) may mediate neural responses to manual acupuncture.</P>