“…Similarly, a pre-HD group demonstrated selective impairments in verbal memory on a word list learning task (Lundervold & Reinvang, 1995). In addition, longitudinal data from a sample of pre-HD participants indicates that declines in verbal learning and memory are detectable prior to clinical symptom onset (Lemiere, Decruyenaere, Evers-Kiebooms, Vandenbussche, & Dom, 2004). Specifically, studies of memory in pre-HD have documented significantly poorer performance, relative to non-CAG expanded individuals, on measures of learning (Rosenberg, Sorensen, & Christensen, 1995), semantic clustering (Rosenberg et al, 1995), recall (Hahn-Barma et al, 1998;Rosenberg et al, 1995), and recognition discriminability (Berrios et al, 2002;Lanto, Riege, Mazziotta, Pahl, & Phelps, 1990).…”