The Daubert trilogy of U.S. Supreme Court cases has established that scientific expert testimony must be based on science grounded in empirical research. As such, greater scrutiny is being placed on questioned document examination generally, and handwriting comparison in particular. Bridging the gap between theory and practice, The Neuroscience of Handwriting: Applications in Forensic Document Examination examines the essential neuroscientific principles underlying normal and pathological hand motor control and handwriting.Topics discussed include:Fundamental principles in the neuroanatomy and neurochemistry of hand motor control and their application to research in handwritingThe epidemiology, pathophysiology, and motor characteristics of neurogenerative diseases such as Parkinson's, Huntington's, Alzheimer's, multiple sclerosis, essential tremor, and motor neuron disease and their effects on handwritingPsychotropic medications prescribed for depression, bipolar disorder, and psychosis; their mechanisms of action; and their effect on motor behavior and handwritingThe impact of substance abuse on handwritingAn overview of the aging process and its effects on motor control and handwritingThe kinematic approach and new findings on the kinematic analyses of genuine, disguised, and forged signaturesThe authors' laboratory research on authentic and forged signaturesAn essential resource for professionals and researchers in the forensic documentation examination and legal communities, this volume provides a window on the scientific process of signature and handwriting authentication, integrating the extensive research on neural processes and exploring how disease, medication, and advanced age alter these processes.

FUNDAMENTAL ASPECTS OF MOTOR CONTROL AND HANDWRITING. Neuroanatomical and Neurochemical Bases of Motor Control. Neuroanatomical Bases of Handwriting Movements. Models of Handwriting Motor Control. Neurological Disease and Motor Control. Psychotropic Medications: Effects on Motor Control. Aging and Motor Control. KINEMATICS OF SIGNATURE AUTHENTICATION. A Kinematic Approach to Signature Authentication. Isochrony in Genuine, Autosimulated, and Forged Signatures. Kinematic Analyses of Stroke Direction in Genuine and Forged Signatures. NEUROLOGIC DISEASE, DRUGS, AND AGING AND THEIR EFFECTS ON HANDWRITING. Neurological Disease and Handwriting. Effects of Psychotropic Medications on Handwriting. Substance Abuse and Handwriting. Aging and Handwriting. Conclusions. Bibliography.