This is an extract of our Introduction To Amnesia. Lec 1docx document, which we sell as part of our Neuropsychology of Memory Notes collection written by the top tier of Durham University students.
The following is a more accessble plain text extract of the PDF sample above, taken from our Neuropsychology of Memory Notes. Due to the challenges of extracting text from PDFs, it will have odd formatting:
Introduction to AmnesiaPatient H.M. - Scoville & Milner(1957)
- Long history of major + minor seizures + uncontrollable by multiple forms of medication - intractable epilepsy
- Radical bilateral medial temporal lobe resection
- After - incidence + severity of seizures dramatically reduced
- Anterograde memory almost entirely absent + some retrograde loss
- His RA extended approx. between 3+ 11 yrs
Measuring Anterograde Amnesia (AA)?
Wechsler Memory scale ? personal + current info/ mental control (recite alphabet etc) / logical memory (recall short story)/digit span/paired associate learning/visual reproduction - rey osterrieth figure - draw from memory (potentially dissociable)
- HM memory quotient = 67 - v. deficient Rivermead behavioural memory test ? practical test of everyday memory
- Remembering - name from photo/hidden belonging
- Recognition - 10 line drawings over 5 mins / 10 faces over 5mins
Measuring Retrograde Amnesia (RA)?
Test for public events + famous faces over diff time periods - before onset of amnesia - uncover the extent of the temporal gradient e.g. Squire et al (1989) Autobiographical Memory Interview (AMI)
- Assesses recall of facts from person's life (personal semantic) - standardised e.g. school
- Recall of specific incidents in patients life - episodic - verified by family
- Assesses 3 broad time spans : childhood/early adult life/recent facts +
incidents ? enables you to gauge the temporal gradient
- Advantantages ? easy to administer / not dependent on level of patient interest in current affairs / does not require regular updating BUT difficult to know the accuracy of incidents
Spared abilities in amnesia 1) Intellectual abilities - speech + IQ 2) STM/WM
? Baddeley & Warrington (1970) - compared performance of amnesic patients + control ptp's on immediate and delayed free recall
- Peterson short term forgetting task, paired associate learning , digit span , Hebb digit sequence technique
- Amnesic ptp's have normal STM but defective LTM 3) Conditioning
- Warrington & Weitkrantz - conditioned eye blink responses in 2 severe amnesics - tone and puff of air conditioned an eye blink in them 4) Priming
? Warrington & Weizkrantz (1970) Gollins incomplete pictures test - line/dot to dot drawings - increasing to full drawings - remember
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