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→Jaw Opening Muscles
===Jaw Opening Muscles===
===Jaw Opening Muscles===
All jaw closing muscles are derived from the first visceral arch and are innervated by the '''mandibular''' branch of the '''trigeminal''' nerve ([[Cranial Nerves - Anatomy & Physiology|CN V3]]).
All jaw opening muscles are derived from the first visceral arch and are innervated by the '''mandibular''' branch of the '''trigeminal''' nerve ([[Cranial Nerves - Anatomy & Physiology|CN V3]]).
The '''masseter muscle''' originates from the [[Skull and Facial Muscles - Anatomy & Physiology#Maxilla|maxilliary]] region of the skull and the zygomatic arch. It inserts on the wide area on the caudal side of the [[Skull and Facial Muscles - Anatomy & Physiology#Mandible (mandibula)|mandible]]. It has several divisions and causes '''unilateral''' and '''bilateral''' contraction. It also protrudes the jaw.
The '''masseter muscle''' originates from the [[Skull and Facial Muscles - Anatomy & Physiology#Maxilla|maxilliary]] region of the skull and the zygomatic arch. It inserts on the wide area on the caudal side of the [[Skull and Facial Muscles - Anatomy & Physiology#Mandible (mandibula)|mandible]]. It has several divisions and causes '''unilateral''' and '''bilateral''' contraction. It also protrudes the jaw.
The '''medial pterygoid muscle''' originates from the [[Skull and Facial Muscles - Anatomy & Physiology#Pterygoid Bone (os pterygoideum)|pterygopalatine]] region of the skull. It inserts on the medial aspect of the [[Skull and Facial Muscles - Anatomy & Physiology#Mandible (mandibula)|mandible]]. It causes one-sided contraction to close the jaw.
The '''medial pterygoid muscle''' originates from the [[Skull and Facial Muscles - Anatomy & Physiology#Pterygoid Bone (os pterygoideum)|pterygopalatine]] region of the skull. It inserts on the medial aspect of the [[Skull and Facial Muscles - Anatomy & Physiology#Mandible (mandibula)|mandible]]. It causes one-sided contraction to close the jaw.
The '''temporal muscle''' originates from the lateral surface of the cranium. It inserts on the coronoid process. It pulls the [[Skull and Facial Muscles - Anatomy & Physiology#Mandible (mandibula)|mandible]] dorsally and also pulls the [[Skull and Facial Muscles - Anatomy & Physiology#Mandible (mandibula)|mandible]] rostrally (overbite) and caudally (underbite).
The '''temporal muscle''' originates from the lateral surface of the cranium. It inserts on the coronoid process. It pulls the [[Skull and Facial Muscles - Anatomy & Physiology#Mandible (mandibula)|mandible]] dorsally and also pulls the [[Skull and Facial Muscles - Anatomy & Physiology#Mandible (mandibula)|mandible]] rostrally (overbite) and caudally (underbite).
===Lateral Translation of the Mandible===
===Lateral Translation of the Mandible===