Chat with AIExam 15: Emotions, Aggression, and Stress
A consequence of Derrick's regular use of marijuana might be
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Epigenetic regulation represents a change in
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Describe the neurological control of facial expressions and explain the differences in control of the superficial and deep facial muscles.
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Answered by Examlex AI CopilotThe neurological control of facial expressions involves the coordination of various muscles in the face, which are controlled by the facial nerve (cranial nerve VII). This nerve originates in the brainstem and branches out to innervate the muscles of facial expression.
The superficial facial muscles, such as the orbicularis oculi (which closes the eyelids) and the zygomaticus (which raises the corners of the mouth in a smile), are controlled by the upper motor neurons in the primary motor cortex of the brain. These muscles are involved in producing voluntary facial expressions and are under conscious control.
On the other hand, the deep facial muscles, such as the buccinator (which helps with sucking and blowing) and the platysma (which pulls down the lower lip and corners of the mouth), are controlled by the lower motor neurons in the brainstem. These muscles are involved in producing more subtle and automatic facial movements, such as those involved in speech and eating.
The differences in control of the superficial and deep facial muscles reflect the complexity of facial expression and the need for both voluntary and involuntary movements to convey a wide range of emotions and communicate effectively. The neurological control of facial expressions is a highly coordinated process that involves both conscious and unconscious pathways to produce the intricate and nuanced movements of the face.
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