BIOL1900 Lecture Notes - Lecture 20: Motor Neuron, Stanley Milgram, Spinal Cord
Document Summary
Injury that prevents normal or desired movement: plan = action. Neurons: sensory neurons (afferent, motor neurons (efferent) The motor unit: motor neuron and all the muscle fibres it innervates, each muscle fibre innervated by a single motor neuron, each motor neuron innervates many muscle fibres. Motor control: spinal cord, brain and brainstem. Types of movement: reflexes, stretch reflex, muscle spindle detects magnitude and rate of stretch, excitation of synergists to assist in bringing joint angle to original position. In groups and out groups: human social behaviour and beliefs are, homogeneous within groups, heterogeneous between groups. Asch"s study: 7-9 people, only one a real participant, confederates (actors) gave right answer, participant gave right answer, confederates started to give the wrong answers and so did participant. Low group status: unsure of a situation, behaviour is public. Positive aspects: allows individuals to feel connected, society runs more smoothly. Negative aspects: suppress critical thinking, can lead to destructive behaviours.
