Acetylcholine bound to a receptor Intermediate 06/14/2012 Dreaming Man (Left Lateral) Beginner 05/29/2012 Dreaming Man (Anterior) Beginner 05/29/2012 Dopamine Advanced 05/29/2012 Brain Anatomy Intermediate 05/25/2012 Oculomotor Nerve Lesion Advanced 05/25/2012 Brainstem - Labeled Intermediate 05/24/2012 Brainstem - Unlabeled Intermediate 05/24/2012 Cochlear Amplification Mechanism Intermediate 05/24/2012 Brain Lobes - Labeled Intermediate 05/23/2012