Health Sciences 2300A/B Lecture Notes - Parotid Gland, Occipitofrontalis Muscle, Digastric Muscle
12 Mar 2014
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Movement, creation of heat, excitation / stimulation of cells. Based on: location, function, size, region, shape, # of origins. Ex: longus longer of 2 muscles. Ex: sartorius named after greek word for a tailor. Either assists in facial expression or chewing. It then branches off to 5 main branches: When the parotid gland gets infected, it swells. Swelling puts pressure on facial nerve (hindering its function) As a result, the face melts" bell"s palsy. All innervated by the hypoglossal nerve 12. All innervated by the vagus nerve (cn x) Act as constrictors of the pharynx during swallowing. Pharyngeal constrictors: constrict, pushing food into the esophagus. Composed of superior, middle, inferior pharyngeal constrictors. Used mainly to raise the larynx and depress the mandible (open mouth) Digastric: composed of anterior and posterior bellies. Used to depress the hyoid bone and larynx during swallowing and speaking. Splenius capitus: innervated by cervical spinal nerves. Rotates the head opposite to the way it contracts to.
