PSYC 2307B Human Neuropsychology I Dr. Brian Tansley office: Loeb A500 office hours: by appointment email: brian.tansley@carleton.ca Course Learning Objectives: An introduction to the basic principles, scientific research techniques and issues associated with the study of the neural basis of behaviour and experience in typical and brain-damaged people. *PSYC2307 is a prerequisite for PSYC3307 (Human Neuropsychology II). The Course Covers 16 Topics Presented in 24, 80 min. Lectures Several of the topics take more than one 80 min. lecture period to present... (See the course outline...) Four sources of course content : (1) What I have to say* about each topic (2) The topic’s accompanying Powerpoint slide deck (3) The course textbook: Kolb and Whishaw, th 8 edition (available in the bookstore). (4) Examples from the scientific research literature in each course topic (available in the PSYC2307B Brightspace course page topic frames.) Course Evaluation A Midterm Exam (1.5 hrs., 35%) (Feb. 16) A Final Exam (3 hrs., 65%) in the exam period at the end of the semester (date, time and location TBA) Exams are closed book, short answer format Bonus: up to 3, one-page summaries of a research paper from the course Brightspace page (no two from the same Topic) may be prepared in advance in hardcopy and submitted with your final exam.. Each summary is awarded up to 5 points which are added to your final exam total. (See details in the course outline) QUESTIONS? PSYC 2307 Human Neuropsychology I Topic 1: Introduction & Origins Human Neuropsychology Defined General: the scientific study of the neural basis of human experience and behaviour Clinical Neuropsychology (distinct from Clinical Psychology): evaluation and treatment of brain abnormalities affecting experience and behaviour What is Experience? The end-product of perception, the cognitive faculty that is a property of consciousness What is behaviour? The end-product of conation, the cognitive faculty that leads to purposive skeletal muscle activity controlled by the somatic nervous system Experience and Behaviour derive from contributions to nervous system structure and function from both genetic and memetic information sources & processes. Genetic Information (Nature) Information obtained from sexual reproduction (i.e., inherited from parents) Carried in the configuration of DNA molecules in the cell nucleus Results in the production of specific molecules and proteins Memetic Information (Nurture) Information obtained from sensation/perception Stored in (and recalled from) memory General Factors Affecting Brain Function Genetics Nutrition Experience Vegetative physiology Tissue Ablation Drugs Electromagnetic energy Today’s Neuropsychologist Evaluation of the brain/behaviour relationship through: behavioural assessment of perceptual, cognitive and psychomotor functions associated with specific brain regions monitoring local brain metabolism during the performance of tasks (fMRI, PET, etc.) monitoring local brain electrical activity (EEG and Event-Related Potentials) temporarily altering local brain functions e.g., using transcranial magnetic stimulation (TMS). Why study brain/behaviour phenomena? How the brain produces both behaviour and consciousness are interesting & largely unanswered questions. Research leads to a better understanding of brain/behaviour disorders, better diagnosis and better treatment. Society for Clinical Neuropsychology (Division 40 of the American Psychological Association) -- a scientific and professional organization of psychologists interested in the study of brain-behavior relationships, and the clinical application of that knowledge to human problems. Clinical Neuropsychology Assessment of CNS function in ABI and TBI adults and children Comparison of results of cognitive, emotional, sensory and motor tests to populations matched on demographic variables (age, gender, etc.) Modern testing is automated (e.g., NIH toolbox, CANTAB) but still requires patient cooperation Use of standardized testing protocols Statistical comparisons to ‘norms’ Malingering remains an issue… Recent Job Ad for a Neuropsychologist in Toronto… Ph.D. or Psy.D. in Psychology with valid registration with the College of Psychologists of Ontario (i.e., C.Psych.) Proof of professional liability insurance Documented competency in the areas of Clinical Neuropsychology and Clinical Psychology (adults) or Rehabilitation Psychology (adults) with no restrictions on license to practice Documented competence in Assessment At least two years experience conducting assessments of individuals with acquired brain injury (ABI) and other neurological problems knowledge of comorbid psychological factors in ABI Recent Job Ad for a Neuropsychologist in Toronto… (Cont’d) Demonstrated commitment to continuing education and professional development Medico-legal and third party assessment experience preferred Experience writing professional reports for third party payors preferred Excellent written and oral communication skills Excellent interpersonal and time management skills Experience working in an interdisciplinary setting Membership in OPA or CPA preferred How long does it take to be qualified to apply for a job like this? Undergraduate Honour’s Degree in Experimental Psychology (4+ years) Master’s Degree in Clinical or Experimental Psychology (2+ years) Ph.D. or Psy.D. Degree in Clinical Neuropsychology (5+ years) Clinical Internship or Postdoctoral Training (2+ years) On the job experience (+ or in parallel) Total ~ 7 - 9 yrs postgraduate training Admission requirements to some graduate programs in clinical neuropsychology Example, Ottawa U clinical psychology program: Average GPA = 9.3/10 (Carleton equivalent: 11.1/12) Half the entrants had at least one publication… Neuropsychology Doctoral program (average time to completion from Bachelor’s Degree) = 7.3 years (Ottawa U.), 7.9 years (York U.) What kinds of career paths are available to someone trained as a neuropsychologist? Experimental neuropsychology: institutional research and teaching: university faculty positions, involving teaching and research Clinical Neuropsychology Private practice (clinical neuropsychology): Institutional practice: Part-time Hospital Consultant: Note: See U.S. Neuropsychologist’s Salary Survey in the top frame of the CuLearn Course Page… Origins of Neuropsychology As with most sciences, neuropsychology rests on the philosophical foundation of materialism ”matter” is the fundamental substance in nature, and that human behaviour and consciousness have a purely material basis Informed mid-19th century life science – (mainly in Germany and England) -- and has done so ever since… Decoupled life science from religious dogma allowing the study of the neural basis of behaviour and thought with the Scientific Method… Are we humans (as John Horgan put it) just ”matter that yearns to matter”? Theory of Evolution (1858) Charles Darwin and Alfred Wallace published, jointly, the (independently arrived-at) theory of evolution in 1858. Darwin published On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life (1859) --“The academic book that most changed the way we think about the world” (according to the British Booksellers Assn.) Herbert Spencer (1820-1903) English polymath strongly influenced by Darwin’s Theory of Evolution Applied evolutionary theory to biological organisms, the human mind, human culture and societies Influenced many philosophers and scientists in the 19th century both in England and elsewhwere… Spencer’s Principles of Psychology (1855) was one of the first textbooks in psychology that explored its physiological basis. Some 19th - early 20th century technological developments that advanced neuropsychology the Golgi stain/histology the mirror galvanometer analgesics and anesthetics electronics artificial light optical design and fabrication biochemistry publishing and broadcasting photography Some 19th - early 20th century disciplines that influenced neuropsychology Psychophysics Mental Chronometry Electrophysiology Neurology/neurosurgery Psychophysics: the relation between the physical world and experience Made possible by the precision of 19th century analytic measurement and recording instruments (for quantifying electricity, light intensity and spectral energy distributions, sound, heat, chemical reactions, time, etc.) Functional relationships between the intensity of a physical stimulus (e.g., light intensity) and one’s experience of it (‘brightness’) At Threshold: Weber’s Law: (D𝚽/𝚽 = constant) Above Threshold: Fechner’s Law (𝚿 = k log 𝚽) The relationship between the physical world and our experience of it... The dot density of A1 and B1 appear different When 100 dots are added to both (as in A2 and B2) the two no longer appear different (In both pairs the density differs by 10 dots) 1 A B 2 Gustav Theodor Fechner (1801-1887) Along with Helmholtz and Wundt, a founder of experimental psychology October 22, 1850 Fechner had a dream that resulted in a new approach to the study of the relation between brain and mind – that he called this approach psychophysics and proposed its “law”: “In order that a sensation (𝚿) increases in arithmetic progression, the physical stimulus (𝚽) must increase in geometrical progression”… 𝚿 = k log(𝚽) About 110 years earlier the Swiss mathematician Gabriel Cramer had noted a similar relationship between the (physical) value and (psychological) utility of money…) Fechner’s Law (~1860) Wilhelm Wundt (1832-1920) (University of Leipzig) Studied sensory systems under Mueller and Helmholtz at the University of Heidelburg using methods derived from physics called psychophysiology Wundt founded the first psychology laboratory in Leipzig in 1879. The Scottish physician and psychologist, David Ferrier, also studied in Heidelburg and became influential in England in brain research Mental Chronometry As early as 1868-1869 the Dutch ophthalmologist Franciscus Donders (1818 1869) measured the amount of time taken to produce a simple motor response following a visual or auditory stimulus – called the ‘simple’ reaction time… Observed that reaction times that involved a decision (e.g., between two response alternatives) took longer that the simple RT (aka ‘choice reaction time) RT techniques remain an important research tool for cognitive studies Electrophysiology In the mid-1780s, Italian physician Luigi Galvani connected the nerves of a recently dead frog to a long metal wire and pointed it toward the sky during a thunderstorm. With each flash of lightning, the frog’s legs twitched and jumped as if they were alive. It was this macabre scene that would inspire the British novelist Mary Shelley to write her gothic masterpiece, Frankenstein, 20 years after the physician’s 1798 death. But more importantly, through such experiments Galvani proved not only that recently-dead muscle tissue can respond to external electrical stimuli, but that muscle and nerve cells possess an intrinsic electrical force responsible for muscle contractions and nerve conduction in living organisms. Galvani named this newly discovered force “animal electricity,” and thus laid foundations for the modern fields of electrophysiology and neuroscience. The discovery of the brain’s electrical activity... Gustav Fritsch and Eduard Hitzig (1870) electrically stimulated dog cortex and observed movements of the contralateral limbs… Richard Caton (1842 – 1926) English physician (Liverpool) and a pioneer of electrophysiology Recorded spontaneous electrical activity from cerebral cortex of “dogs & apes” using a string galvanometer Promoted electrophysiology for medical applications Neurology Subdisciplines of medicine concerned with disorders of the nervous system closely aligned with neuropsychology 19th century & early 20th century neurology utilized a combination of careful observation and assessment of patients’ behavioural, cognitive and emotional symptoms to diagnose (and monitor the effectiveness of treatment of) neurologic disorders and conditions “gunshot-wound neurology” -- studying brain structure/function relationships in braindamaged war veterans Paul Broca (1824-1880) French physician, surgeon, anatomist, anthropologist Influenced by Darwin and Wallace (“I would much rather be a perfected ape than a degraded Adam.”) Studied patients with aphasia From autopsies he concluded that the 3rd frontal convolution in the left hemisphere was responsible for speech production... Carl Wernicke (1848-1905) German psychiatrist, anatomist and neuropathologist Inspired by Broca’s work on motor aphasia Wernicke's interests in psychophysiology and aphasiology relating to language led to the discovery Wernicke's aphasia (aka receptive or fluent aphasia) – the inability to understand speech, or to produce meaningful speech, caused by lesions to the posterior superior temporal gyrus. John Hughlings Jackson (1835 – 1911) English neurologist, influenced by Darwin’s theory of evolution Noted how convulsions in patients with focal epilepsy originated in the distal limbs and progressed over a short time to the face (aka the “Jacksonian March”) Proposed that the evolution of the nervous system occurred at three levels At the lowest level, movements are represented in their least complex form; such centres lie in the medulla and spinal cord. The middle level consists of the so-called motor area of the cortex, The highest motor levels are found in the prefrontal area. Postulated that higher centres normally inhibited lower ones Lesions of the higher centres removed the inhibition of these lower centers, allowing their primitive functions to be exhibited (a term he called “dissolution” -- borrowed from Herbert Spencer) Karl Lashley (1890-1958) American psychologist pioneered the use of ablation techniques to study brain/behaviour relationships Promoted the idea of ‘cortical equipotentiality’ Researched the physiological basis of learning and memory (the engram) Donald Hebb’s thesis supervisor Neurosurgery The turn of the 20th century resulted in the advent of neurosurgery as a specialization Advances in life-support technologies such as respirators, blood-gas monitors, electrocautery tools and the development of anaesthetics and analgesics made more complex surgeries possible. Neurosurgical techniques were developed to address the increased numbers of soldiers injured by the mechanized weaponry developed in the late 19th and early 20th century. Wilder Penfield (1891-1976) American/Canadian neurosurgeon brought to McGill University in 1928 and founded the Montreal Neurological Institute in 1934 (with William Cone). Between 1934-1960 performed > 1200 craniotomies for treatment of focal epilepsy -- the “Montreal procedure” Systematic mapping of cortical function using electrical stimulation during surgery https://can-acn.org/wilder-penfield The Montreal Procedure included studying brain behaviour relationships by electrically stimulating the cerebral cortex of awake patients during cranial surgery. Penfield and Boldrey’s Famous Homunculus Drawn by Mrs. Hortense P Cantlie, a medical illustrator at McGill University (ca. 1936-37) and included in Boldrey’s Master’s Thesis (Boldrey was a 1st year neurosurgical resident supervised by Penfield) Fig. 28 P&B, 1937 ca. 1950 Consciousness/Experience: a Brain Construction... Thought/Experience Behaviour Behavioural Precursors Information from the environment The CNS Memory Sensory Channels in the Peripheral Nervous System Information regarding bodily status Sensory Processes Perceptual Processes Donald O. Hebb (1904 – 1985) Influential neuropsychologist at McGill University Worked with the neurosurgeon Wilder Penfield His book “The Organization of Behaviour: a Neuropsychological Theory” (1949) was an influential, early account of how neurons organize themselves to form networks (‘neurons that fire together wire together’) Many of his students became famous neuropsychologists in their own right (Milner, Olds, Nadel, Kimura, Posner, etc.) Hans-Lukas Teuber (1916-1977) One of the founders of neuropsychology – originally trained as a social psychologist 1946-1961 worked as a psychophysiologist at NYU Bellvue 1960 – 1977 professor and head of psychology at M.I.T. Studied frontal lobe functions in U.S. military veterans with penetrating missle wounds to the head Studied cognitive functions of Henry Molaisson Alexander Luria (1902-1977) Soviet neuropsychologist studied brain-injured victims of World War II often credited as a father of modern behavioural neuropsychological assessment developed an extensive and original battery of neuropsychological tests some of which are still in use today Links to Functional Neuroimaging The future of Clinical Neuropsychology will be strongly linked to improvements in functional neuroimaging technologies. Functional Neuroimaging training is recommended. • (Roalf and Gur, 2017) Pre‐Doctoral Internships in Clinical Neuropsychology (University of Toronto, McMaster University)