The nature and pattern of the symptoms and physical signs of neurological disease allow inferences to be drawn about the sites of the lesions causing them. One symptom indicating muscular disease is weakness, usually symmetrical that is, affecting both sides of the body and mainly affecting the proximal or girdle muscles. This type of weakness may be noticed when climbing stairs, arising from a deep chair, brushing the hair, or lifting an object. Facial weakness results in drooling and in difficulty in whistling. Weak masticatory muscles tire easily, so that food is chewed with difficulty, while bulbar muscle involvement leads to problems with phonation, articulation, and swallowing. Diseased muscles may also swell and be tender to the touch, or they may cramp.
The facial muscles are a group of striated skeletal muscles supplied by the facial nerve cranial nerve VII that, among other things, control facial expression. These muscles are also called mimetic muscles. The facial muscles are just under the skin subcutaneous muscles that control facial expression. They generally originate from the surface of the skull bone rarely the fascia , and insert on the skin of the face. When they contract, the skin moves. These muscles also cause wrinkles at right angles to the muscles' action line. The facial muscles are supplied by the facial nerve cranial nerve VII , with each nerve serving one side of the face.
The CNS consists of the brain and spinal cord. The brain is an important organ that controls thought, memory, emotion, touch, motor skills, vision, breathing, temperature, hunger, and every process that regulates our body. The cerebrum front of brain is composed of the right and left hemispheres, which are joined by the corpus callosum.
Posted by Ethan Nguyen Portrait Drawing 2. So I was going over some anatomy book in preparation for re-making my portrait drawing course and I thought it would be helpful to do a video on drawing the muscles of the head. Now, we will use the distant between the hair and brow line to find the bottom of the nose…. The ear will fall in the lower left quadrant right between the brow line and nose. And the jaw will connect to the ear.