Muscles of head and neck from "summary" of Bd Chaurasia's Human Anatomy, Volume 1 by B. D. Chaurasia
The muscles of the head and neck play a crucial role in various functions such as mastication, facial expression, speech, swallowing, and head movement. These muscles are classified into several groups based on their location and function. The muscles of mastication are responsible for the movement of the mandible during chewing. The masseter, temporalis, medial pterygoid, and lateral pterygoid muscles are the main muscles involved in this process. These muscles work together to produce the necessary force for chewing and grinding food. Facial expression muscles are responsible for the various facial expressions we make, such as smiling, frowning, and raising eyebrows. The muscles of facial expression include the frontalis, orbicularis oculi, orbicularis oris, zygomaticus, and buccinator muscles. These muscles are innervated by the facial nerve and allow us to convey emotions and communicate non-verbally. The muscles of the pharynx and larynx play a crucial role in swallowing and speech. The pharyngeal constrictors help propel food down the esophagus during swallowing, while the intrinsic laryngeal muscles control the position of the vocal cords and regulate airflow during speech production. These muscles work in coordination to ensure proper swallowing and speech function. The muscles of the neck are responsible for various movements of the head and neck region. The sternocleidomastoid muscle helps rotate and flex the head, while the scalene muscles assist in neck movements and respiration. The trapezius muscle helps elevate and depress the shoulder girdle and extend the head.- The muscles of the head and neck are essential for performing everyday functions such as eating, speaking, and expressing emotions. Understanding the anatomy and function of these muscles is crucial for healthcare professionals to diagnose and treat various conditions affecting the head and neck region.
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