Answer
The suprahyoid muscles are a group of muscles located above the hyoid bone in the neck. They play a crucial role in various functions, including swallowing and speech. Here are the muscles you mentioned from the suprahyoid group:
1. **Digastric Muscle:**
- The digastric muscle consists of two muscle bellies connected by an intermediate tendon. It is named for its two muscle bellies: the anterior and posterior digastric muscles.
- The anterior belly of the digastric muscle originates from the digastric fossa of the mandible.
- The posterior belly of the digastric muscle originates from the mastoid notch of the temporal bone.
- Both bellies insert into the intermediate tendon and then onto the body of the hyoid bone.
- Function: The digastric muscle helps open the mouth by depressing the mandible and also assists in swallowing by elevating the hyoid bone.
2. **Geniohyoid Muscle:**
- The geniohyoid muscle is a thin, flat muscle located between the chin (genio-) and the hyoid bone.
- It originates from the mental spine of the mandible.
- It inserts into the body of the hyoid bone.
- Function: The geniohyoid muscle primarily elevates the hyoid bone and assists in swallowing.
3. **Mylohyoid Muscle:**
- The mylohyoid muscle forms the floor of the mouth.
- It originates from the mylohyoid line of the mandible.
- It inserts into the midline raphe and the body of the hyoid bone.
- Function: The mylohyoid muscle assists in elevating the hyoid bone, supporting the tongue, and forming the floor of the mouth. It also aids in swallowing and speech.
4. **Stylohyoid Muscle:**
- The stylohyoid muscle is a slender muscle located between the styloid process of the temporal bone and the hyoid bone.
- It originates from the styloid process.
- It inserts into the body of the hyoid bone.
- Function: The stylohyoid muscle helps elevate and retract the hyoid bone, playing a role in swallowing and speech.
Together, the suprahyoid muscles work as a group to assist in various functions, primarily related to the movement and stabilization of the hyoid bone, which is essential for proper swallowing and speech articulation.
Work Step by Step
The suprahyoid muscles are a group of muscles located above the hyoid bone in the neck. They play a crucial role in various functions, including swallowing and speech. Here are the muscles you mentioned from the suprahyoid group:
1. **Digastric Muscle:**
- The digastric muscle consists of two muscle bellies connected by an intermediate tendon. It is named for its two muscle bellies: the anterior and posterior digastric muscles.
- The anterior belly of the digastric muscle originates from the digastric fossa of the mandible.
- The posterior belly of the digastric muscle originates from the mastoid notch of the temporal bone.
- Both bellies insert into the intermediate tendon and then onto the body of the hyoid bone.
- Function: The digastric muscle helps open the mouth by depressing the mandible and also assists in swallowing by elevating the hyoid bone.
2. **Geniohyoid Muscle:**
- The geniohyoid muscle is a thin, flat muscle located between the chin (genio-) and the hyoid bone.
- It originates from the mental spine of the mandible.
- It inserts into the body of the hyoid bone.
- Function: The geniohyoid muscle primarily elevates the hyoid bone and assists in swallowing.
3. **Mylohyoid Muscle:**
- The mylohyoid muscle forms the floor of the mouth.
- It originates from the mylohyoid line of the mandible.
- It inserts into the midline raphe and the body of the hyoid bone.
- Function: The mylohyoid muscle assists in elevating the hyoid bone, supporting the tongue, and forming the floor of the mouth. It also aids in swallowing and speech.
4. **Stylohyoid Muscle:**
- The stylohyoid muscle is a slender muscle located between the styloid process of the temporal bone and the hyoid bone.
- It originates from the styloid process.
- It inserts into the body of the hyoid bone.
- Function: The stylohyoid muscle helps elevate and retract the hyoid bone, playing a role in swallowing and speech.
Together, the suprahyoid muscles work as a group to assist in various functions, primarily related to the movement and stabilization of the hyoid bone, which is essential for proper swallowing and speech articulation.
