In {HEAD ~ addition}, high frequency power has {TAIL ~ a more specific effect} on disabling the central nervous system 
In { HEAD ~ addition } , high frequency power has { TAIL ~ a more specific effect } on disabling the central nervous system
OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH