Admin Table of Contents
- 1 Which of the following muscle of mastication would be responsible for mandibular elevation?
- 2 What is the thick bundle of nerve fibers located within the vertebral column?
- 3 Is a thick band of nerve fibers connecting the two cerebral hemispheres?
- 4 What neural fibers connect the thalamus to the cerebral cortex?
- 5 What muscles close the mandible?
- 6 What muscles protrude the mandible?
- 7 What muscles are involved in the movement of the jaw?
- 8 What is the function of the mandibular muscles?
Which of the following muscle of mastication would be responsible for mandibular elevation?
The masseter is one of the muscles of mastication. It is a powerful superficial quadrangular muscle originating from the zygomatic arch and inserts along the angle and lateral surface of the mandibular ramus. The masseter is primarily responsible for the elevation of the mandible and some protraction of the mandible.
What is the thick bundle of nerve fibers located within the vertebral column?
8 Cards in this Set
| What are the two major divisions of the nervous system? | 1. central 2. peripheral |
|---|---|
| What is the thick bundle of nerve fibers located within the vertebral column? | spinal cord |
| What is the fatty, white covering found in the white matter of the brain and spinal cord? | myelin |
What two muscles inferiorly attaches to the mandible?
The masseter muscle fibers converge inferiorly, forming a tendon that inserts the outer surface of the mandibular ramus and coronoid process of the mandible.
Which muscle opens the jaws and protrudes the mandible?
The masseter muscle is one of four muscles of mastication and has the primary role of closing the jaw in conjunction with two other jaw closing muscles, the temporalis and medial pterygoid muscles. The fourth masticatory muscle, the lateral pterygoid, causes jaw protrusion and jaw opening when activated.
Is a thick band of nerve fibers connecting the two cerebral hemispheres?
The two hemispheres are connected by a thick band of nerve fibres called the corpus callosum. The brain halves are able to communicate with each other via this ‘bridge’.
What neural fibers connect the thalamus to the cerebral cortex?
Commissural fibers Commissural tracts connect corresponding cortical areas in the two hemispheres.
What muscles attach to the mandible?
Muscles Inserting on the Mandible
- Platysma – inserts on the inferior border of the mandible.
- Superficial masseter – inserts on the lateral surface of the ramus and angle of the mandible.
- Deep masseter – inserts on the lateral surface of the ramus and angle of the mandible.
What muscle opens the mandible?
lateral pterygoid
In humans, the mandible rotates forward during opening and the temporomandibular joint allows lateral movements as well. Muscles that depress the mandible and thus open the jaw include the anterior digastric, mylohyoid, and inferior head of the lateral pterygoid.
What muscles close the mandible?
The muscles that close the jaw are much more powerful than the ones that open it. Closing is produced by three large muscles on each side, the medial pterygoid, the temporalis, and the masseter.
What muscles protrude the mandible?
The lateral pterygoid muscle has a triple function. Simultaneous contraction of the bilateral inferior belly of the lateral pterygoid muscle with the medial pterygoid muscle results in protrusion of the mandible.
What connects the cerebral hemisphere?
A fissure or groove that separates the two hemispheres is called the great longitudinal fissure. The two sides of the brain are joined at the bottom by the corpus callosum. The corpus callosum connects the two halves of the brain and delivers messages from one half of the brain to the other.
What are the four muscles of the mandible?
Mandible. The lower set of teeth in the mouth is rooted in the lower jaw. Four different muscles connect to the lower jaw to facilitate its movement. These muscles are the masseter, the temporalis, the medial pterygoid, and the lateral pterygoid. Each of these muscles occurs in pairs, with one of each muscle appearing on either side of the skull.
What muscles are involved in the movement of the jaw?
Four different muscles connect to the lower jaw to facilitate its movement. These muscles are the masseter, the temporalis, the medial pterygoid, and the lateral pterygoid.
What is the function of the mandibular muscles?
Mandible. Movement of the lower jaw opens and closes the mouth and also allows for the chewing of food. The lower set of teeth in the mouth is rooted in the lower jaw. Four different muscles connect to the lower jaw to facilitate its movement. These muscles are the masseter, the temporalis, the medial pterygoid, and the lateral pterygoid.
What holds the skull and the mandible together?
When the skull is observed purely as a bony structure, there is nothing anatomically holding the rest of the skull and the mandible together. This bone is also known as the lower jaw and it articulates dentally with the upper jaw or the maxilla in the viscerocranium via the teeth when the mouth is closed.