PSYB64H3 Lecture Notes - Lecture 14: Primary Motor Cortex, Trigeminal Nerve, Facial Nerve

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26 Aug 2016
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Chapter 14 emotion, reward, aggression, and stress: emotion. Has 2 major components: physical sensation and conscious, subjective experience. Contribution to arousal; emotions provide the arousal needed to trigger a response. Emotions manage approach and withdrawal behaviours relative to particular stimuli. Emotions bridge to past memories that can be used to decide how we will respond to certain stimulus. Emotions enhance survival - nonverbal communication (facial expressions, body language) b) Upper third of the face receives input from both ipsilateral and contralateral facial nerves. Lower two thirds are controlled by contralateral facial nerve. Primary motor cortex is responsible for voluntary expressions. Subcortical system that is responsible for spontaneous expressions. Emotional facial paresis- usually happens to people with parkinson"s disease; lose the ability to smile spontaneously while retaining the ability to smile on command. Volitional facial paresis- ability to express voluntarily is impaired. Major emotional expressions: anger, sadness, disgust, surprise, contempt, fear and embarrassment.

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