Question 1

Which is an eccentric function of the stylohyoid?

Accepted Answer

The stylohyoid muscle is responsible for elevating the hyoid bone during swallowing and speech. However, its eccentric function is to restrain or slow down the movement of the hyoid bone during depression. This helps to control the movement of the hyoid bone and prevent it from moving too quickly or forcefully, which could cause injury or discomfort. The other options (A, C, and D) involve the thyroid cartilage, which is not directly related to the function of the stylohyoid muscle.

Question 2

Which is an eccentric function of the mylohyoid?

Accepted Answer

The mylohyoid muscle is responsible for elevating the hyoid bone and depressing the mandible at the TMJs. However, its eccentric function is to restrain or slow down the depression of the hyoid bone, which is important for maintaining the position of the tongue during swallowing and speaking.

Question 3

If a muscle attaches from the mandible to a point that is inferior to that mandibular attachment,what eccentric function of the mandible at the temporomandibular joints (TMJs)will this muscle most likely have?

Accepted Answer

If the muscle attaches from the mandible to a point inferior to that mandibular attachment, it means that when the muscle contracts, it will pull the mandible downwards (depression). Therefore, the eccentric function of this muscle at the TMJs will most likely be to restrain or slow the elevation of the mandible.

Question 4

Which is an eccentric function of the medial pterygoid?

Accepted Answer

The medial pterygoid muscle primarily functions in elevating the mandible (closing the mouth) and aiding in protrusion. When acting eccentrically, it can help control or slow down the opposite movement, which is the depression of the mandible (opening the mouth), making option B correct.

Question 5

Which is an eccentric function of the omohyoid?

Accepted Answer

The omohyoid muscle, when contracting eccentrically, helps to control and slow the elevation of the hyoid bone.

Question 6

Which is an action of the mylohyoid?

Accepted Answer

The mylohyoid muscle is responsible for elevating the hyoid bone. Therefore, option C is the correct action associated with this muscle. The other options are not actions performed by the mylohyoid muscle.

Question 7

Which is an eccentric function of the masseter of the mandible at the temporomandibular joints (TMJs)?

Accepted Answer

The masseter muscle primarily functions in the elevation of the mandible, which is part of the closing of the jaw. However, during eccentric contraction, where the muscle lengthens while under tension, it can help in controlling or slowing down the opposite movement, which in this case is the depression of the mandible. This helps in controlled opening of the mouth.

Question 8

Which is an eccentric function of the sternothyroid?

Accepted Answer

The sternothyroid muscle functions eccentrically to restrain or slow the elevation of the thyroid cartilage.

Question 9

If a muscle attaches from the mandible to a point that is posterior to that mandibular attachment,what eccentric function of the mandible at the temporomandibular joints (TMJs)will this muscle most likely have?

Accepted Answer

Muscles that attach from the mandible to a point posterior to the mandibular attachment are positioned to resist or slow down the forward movement of the mandible, which is known as protraction. Therefore, their eccentric function would most likely be to restrain or slow down protraction at the temporomandibular joints (TMJs).

Question 10

Which is an action of the geniohyoid?

Accepted Answer

The geniohyoid muscle is responsible for elevating the hyoid bone during swallowing and speaking.

Question 11

Which is an eccentric function of the sternohyoid?

Accepted Answer

The sternohyoid muscle, during eccentric contraction, helps in controlling or slowing down the elevation of the hyoid bone, acting against forces that would otherwise elevate it too quickly or too far.

Question 12

If a muscle attaches from the mandible to a point that is medial to that mandibular attachment,what eccentric function of the mandible at the temporomandibular joints (TMJs)will this muscle most likely have?

Accepted Answer

The muscle will restrain/slow ipsilateral deviation because it attaches from the mandible to a point that is medial to the mandibular attachment. This means that when the mandible deviates to the ipsilateral side, the muscle will be stretched and will resist the movement.

Question 13

Which muscles can restrain/slow depression of the mandible at the temporomandibular joints (TMJs)?

Accepted Answer

The masseter and temporalis muscles are primarily involved in elevation of the mandible, but they can also control or slow its depression by providing resistance or a braking action during mouth opening.

Question 14

If a muscle attaches from the mandible to a point that is anterior to that mandibular attachment,what eccentric function of the mandible at the temporomandibular joints (TMJs)will this muscle most likely have?

Accepted Answer

The answer of If a muscle attaches from the mandible...

Question 15

Which is an eccentric function of the digastric?

Accepted Answer

The digastric muscle, when acting eccentrically, can help control or slow down the elevation of the mandible at the temporomandibular joints (TMJs) by providing resistance against the closing force. This action helps in modulating the force and speed of mandible elevation, such as during chewing.

Question 16

Which is an eccentric function of the lateral pterygoid of the mandible at the temporomandibular joints (TMJs)?

Accepted Answer

The lateral pterygoid muscle assists in protraction of the mandible. During eccentric contraction, it helps to control and restrain the retraction of the mandible at the TMJs.

Question 17

Which is (are)an eccentric function of the thyrohyoid?

Accepted Answer

The answer of Which is (are)an eccentric function of the...

Question 18

Which is an eccentric function of the temporalis of the mandible at the temporomandibular joints (TMJs)?

Accepted Answer

The temporalis muscle primarily functions in elevating the mandible (closing the mouth) and retracting the mandible. An eccentric function, where the muscle lengthens while producing force, for the temporalis would involve controlling or slowing down the opposite movement, which is depression (opening the mouth). This helps in modulating the speed and force of mouth opening.

Question 19

If a muscle crosses the spinal joints of the neck anteriorly with a vertical orientation to its fibers,what eccentric function of the neck at the spinal joints will it most likely have?

Accepted Answer

Since the muscle crosses anteriorly with a vertical orientation, it is most likely the sternocleidomastoid muscle. This muscle is known to restrain or slow down extension movements at the neck spinal joints.

Question 20

If a muscle attaches from the mandible to a point that is superior to that mandibular attachment,what eccentric function of the mandible at the temporomandibular joints (TMJs)will this muscle most likely have?

Accepted Answer

Muscles that attach from the mandible to a point superior to the mandibular attachment primarily function in elevating the mandible. Therefore, when acting eccentrically (lengthening under tension), these muscles would restrain or slow down the opposite motion, which is depression of the mandible. Eccentric contractions are used to control or decelerate movements, so in this case, the muscle would help control the lowering of the jaw.

Quiz 12: Muscles of the Temporomandibular Joints

Which is an eccentric function of the stylohyoid?

Which is an eccentric function of the mylohyoid?

If a muscle attaches from the mandible to a point that is inferior to that mandibular attachment,what eccentric function of the mandible at the temporomandibular joints (TMJs) will this muscle most likely have?

Which is an eccentric function of the medial pterygoid?

Which is an eccentric function of the omohyoid?

Which is an action of the mylohyoid?

Which is an eccentric function of the masseter of the mandible at the temporomandibular joints (TMJs) ?

Which is an eccentric function of the sternothyroid?

If a muscle attaches from the mandible to a point that is posterior to that mandibular attachment,what eccentric function of the mandible at the temporomandibular joints (TMJs) will this muscle most likely have?

Which is an action of the geniohyoid?

Which is an eccentric function of the sternohyoid?

If a muscle attaches from the mandible to a point that is medial to that mandibular attachment,what eccentric function of the mandible at the temporomandibular joints (TMJs) will this muscle most likely have?

Which muscles can restrain/slow depression of the mandible at the temporomandibular joints (TMJs) ?

If a muscle attaches from the mandible to a point that is anterior to that mandibular attachment,what eccentric function of the mandible at the temporomandibular joints (TMJs) will this muscle most likely have?

Which is an eccentric function of the digastric?

Which is an eccentric function of the lateral pterygoid of the mandible at the temporomandibular joints (TMJs) ?

Which is (are) an eccentric function of the thyrohyoid?

Which is an eccentric function of the temporalis of the mandible at the temporomandibular joints (TMJs) ?

If a muscle crosses the spinal joints of the neck anteriorly with a vertical orientation to its fibers,what eccentric function of the neck at the spinal joints will it most likely have?

If a muscle attaches from the mandible to a point that is superior to that mandibular attachment,what eccentric function of the mandible at the temporomandibular joints (TMJs) will this muscle most likely have?