Neurosurgery notes/Anatomy/Cortex/Temporal lobe/Temporal lobe assessment

Temporal lobe assessment

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Temporal lobe

Facial recognition

  • King or queen

Long term memory

  • Who is the king

Visual field test

  • Testing for Meyers loop
  • Confrontation → perimetry (Humphrey visual field (HVF)) testing

Short term memory (nonverbal memory)

  • Testing Papez circuit
  • Eg recalling Apple, Ball, Pen
  • Rey–Osterrieth Complex Figure (ROCF) test
    • valuate visuo-constructional ability and non-verbal memory in clinical practice and research.
    • It includes immediate copy and delayed recall.
    • Subjects copy complex geometric shapes and then reproduce them from memory.
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Hearing

  • Testing the Herschel gyrus (Bilateral)
  • Dichotic hearing test
    • Different words given to each ear to see how many patients can recall.
    • In normal can help define hemispheric dominance for language processing
      • The right ear will process more of the information than the left ear
    • In patients with well-localized lesions, the ear contralateral to the involved hemisphere often exhibits poor performance relative to norms (intersubject) or to the other ear (intrasubject, interaural comparison)
    • Test for
      • Left temporal lobe dysfunction
        • The anatomic basis for this finding stems from the more indirect routing of left-ear stimuli, which are first directed to the right hemisphere, and then are impeded in crossing (via the corpus callosum) to the left hemisphere which is required for speech processing and verbal response.
      • Interhemispheric transfer or corpus callosum integrity
        • A left-ear deficit also is seen in young children (under 12 years) whose corpus callosum have not yet attained their full complement of myelin, as well as in the elderly and in individuals with diseases affecting myelin (e.g., multiple sclerosis)
    • If the corpus callosum is involved, a left-ear deficit is seen consistently
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Speech → Fluency + repetition + content

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Comprehension

  • Token test
      • The original version of this test consists of 62 items, but a 36-item short-form is more commonly used in clinical practice
      • The materials consist of tokens which differ in colour, shape (squares and circles) and size (large and small).
      • The examinee has to follow verbal instructions which increase in complexity from simple commands (e.g. ‘Touch a circle’; ‘Touch the red circle’) to commands such as ‘Before touching the yellow circle, pick up the red square’.
      • Assess comprehension of spoken instructions. It measures the capability to carry out commands of varying complexity
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Visual processing

  • McGill Picture Anomaly Test
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