, vasculature and brain ( Torres et al . 1997 , Ortiz et al . 2003 , Kreider et al . 2005 , Roghair et al . 2005 ). Alterations in the activity or responsivity of the sympathetic nervous system (SNS), either systemically or in one of these specific
, vasculature and brain ( Torres et al . 1997 , Ortiz et al . 2003 , Kreider et al . 2005 , Roghair et al . 2005 ). Alterations in the activity or responsivity of the sympathetic nervous system (SNS), either systemically or in one of these specific