PSYC10006 Chap.9 Behavioural Neuroscience: History, Models and Simulation
Behavioural Neuroscience: History, Models and Simulation
The behavioural neuroscience strand opens by defining its own subject matter, which is less obvious than it sounds. The field studies how the brain relates both to behaviour and to the mind, and it needs the third term because observing behaviour alone cannot fully account for it.
The history is presented not as a list of discoveries but as four forces that determined which ideas about the brain could be entertained at all, and the module states that specific dates are not what you will be asked for.
It then places the field among six neighbouring disciplines, sets out what comparing species does and does not establish, and closes on computer simulation of brain function, where it is careful about what it commits to and explicit about what remains unanswered.
What this chapter covers
- 01
Brain, behaviour and mind, and why the third term had to be added back
- 02
Physiological and biological psychology as labels differing in emphasis
- 03
Four forces that shaped what could be believed about the brain
- 04
A chance observation about nerve and electricity as the case for serendipity
- 05
The energy economics: a small share of body mass and a large share of the energy budget
- 06
Two neuron counts that disagree across the subject, and how to report either
- 07
Six allied disciplines, separated by what each measures or manipulates
- 08
Where the work leads: research, clinical and applied routes
- 09
Why absolute brain size does not track intelligence
- 10
Why the brain to body ratio does not settle it either, and what does
- 11
Functional specialisation: brains allocate area to the modality an animal relies on
- 12
Building up from neurons against simulating at large scale, and what neither settles
Assess a comparative claim
- 1Check it against what the subject rules out. Absolute brain size does not explain intelligence and neither does the brain to body ratio, so the student has at least started from the right place.
- 1Check it against what the subject endorses. More neurons and more synaptic connections are said to support greater functional complexity, so the direction of the claim is consistent with the material.
- 1Name the overreach. The observation is a correlation across two species, and two species differ in many ways at once, so a single paired comparison cannot isolate neuron count as the cause.
- 1Say what would strengthen it and write the defensible version: many species rather than two, and a task set that does not advantage either species' sensory specialisation, given that brains allocate area to whichever modality an animal relies on.
Key terms
- Behavioural neuroscience
- The study of how the brain relates to both behaviour and mind. The subject treats physiological and biological psychology as largely synonymous labels differing in how much they emphasise the human mind.
- Scientific conservatism
- One of the four forces the subject names: new claims about the brain were routinely met with scepticism and controversy. It matters because resistance is the normal reception of a new idea rather than a sign that it is wrong.
- Neuropsychology
- The research area and clinical specialty concerned with how damage to the brain affects behaviour and mental function. It is one of two neighbouring disciplines the subject defines by its method rather than by its question.
- Comparative neuroanatomy
- The comparison of brain structures across species, framed evolutionarily. Its lessons in this subject are largely negative: two intuitive measures of brain power turn out not to track functional complexity.
- Neuromorphic computing
- Brain-inspired computer processing built into hardware, sometimes described as a brain on a chip. It is distinguished from software simulation of neuron function, which the subject calls in silico work.
Behavioural Neuroscience: History, Models and Simulation FAQ
Do I need to memorise dates for the history material?
The subject states you will not be asked to recall specific dates, and frames the history as four forces that shaped which ideas about the brain could be entertained. Learn the four forces with one clean example of each, because an item is far more likely to describe a situation and ask which force it illustrates.
How many neurons does the brain contain, according to this subject?
Two different figures appear, an order of magnitude apart, and a later module cites the earlier one while giving the smaller number. Nothing reconciles them. Attribute whichever figure you use to the module you took it from, or write tens of billions, which is true on either reading.
What is the point of the comparative material?
It rules things out. Absolute brain size scales with body size and does not track intelligence; the brain to body ratio does not settle it either. What the subject endorses is neuron and synapse number, and it adds that brains allocate area to whichever modality a species relies on.
Does the subject say a simulated brain could be conscious?
It is careful here and you should be too. Its position is that current simulations are assumed not to generate a mind; it notes that some hold computers already have conscious experience and says that view is neither widely accepted nor supported by evidence; and on whether it could ever happen it says science has no answer and experts disagree.
Assessment move
This module is assessed on framing rather than on recall, so practise stating claims at the right strength rather than collecting facts. Learn the four forces and attach one example to each, since the likely item describes a situation and asks which force it shows. Hold the six allied disciplines by what each one measures or manipulates, because that is what separates them and their subject matter overlaps heavily.
Rehearse the comparative argument as two rejections and one endorsement, and be ready to say why a two-species comparison cannot carry a causal claim. For the simulation material, write out the subject's position on consciousness in one sentence and check it against the module: the two ways to lose marks are asserting it is impossible and asserting it is only a matter of time, and the subject commits to neither.
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