TB6 B&B Lecture 1 MCQ; Object recognition

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  • Created on: 26-11-15 14:34

1. What was the double dissassociation finding from Goodale et al (1994) with patient RV and case DF?

  • Case DF (damage to dorsal) could tell the shape of objects apart but could not correctly grasp them. RV (ventral damage) performed at chance at form discrim but could successfully grasp
  • Case RV (damage to dorsal) could tell the shape of objects apart but could not correctly grasp them. DF (ventral damage) performed at chance at form discrim but could successfully grasp
  • Case RV (damage to ventral) could tell the shape of objects apart but could not correctly grasp them. DF (dorsal damage) performed at chance at form discrim but could successfully grasp
  • Both participants performed at chance at the grasping task and correctly in form discrimination
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2. What is visual agnosia?

  • Objects are not recognised because patients no longer know what they are
  • The names of objects cannot be recognised although the object itself can be recognised and used normally
  • A deficit in visual recognition in the absence of deficits in sensory functions (e.g vision), can be modality-specific
  • A deficit in unfamiliar visual recognition in the absence of deficits in sensory functions (e.g vision), can be modality-specific

3. What was the key point made by Goodale and Humphrey (1998) re; organisational principles?

  • The underlying and essential processes behind vision for perception and vision for action are highlighted by their placement in the brain
  • The position of the structures necessary for vision for action and vision for perception is irrelevent to their function

4. What happens to the size of the receptive fields of ventral stream neurons across the stream?

  • The receptive field size increases and responses shift towards more complex features
  • Each receptive field is differentially sensitive to specific stimuli
  • The receptive field size decreases and responses shift towards less complex features
  • There is no change in receptive field size across the stream

5. From Humphrey & Riddoch (1987), what were patient HJAs behavioural abilities?

  • Can copy drawings of objects (feature by feature), can draw from memory + can recognise from other modalities. Cannot recognise pictures even though can describe features, cannot use gestalt grouping principles, cant decide if novel objects are real
  • Can copy drawings of objects, cant draw from memory + cant recognise from other modalities. Can recognise pictures even though cant describe features, can use gestalt grouping principles, can decide if novel objects are real
  • Can copy drawings of objects (feature by feature), cant draw from memory but can recognise from other modalities. Cannot recognise pictures even though can describe features, can use gestalt grouping principles, can decide if novel objects are real
  • Cant copy drawings of objects, cant draw from memory + cant recognise from other modalities. Cannot recognise pictures even though can describe features, cannot use gestalt grouping principles, cant decide if novel objects are real

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