Former Pakistani president Musharraf pleads not guilty to treason
Musharraf faces the death penalty if convicted of the charges over his suspension of the constitution and imposition of emergency rule in 2007, when he was trying to extend his rule as president.
Judge Faisal Arab, who heads the special panel of three judges, rejected a defence plea for additional time.
Musharraf stood ramrod straight and replied "Not guilty" to each charge. Later his lawyer asked the court's permission for Musharraf to visit his sick mother in Dubai. The former military ruler is currently under house arrest.
(Reporting by Syed Raza Hassan; Writing by Katharine Houreld; Editing by Clarence Fernandez)