Temporomandibular joint anatomy test
Evaluate knowledge of the temporomandibular joint anatomy. The test examines the structure, operating muscles, innervation, and blood supply.
1/20
bold
text
1. Which tissue covers the articular surfaces of the temporomandibular joint?
-
Fibrocartilage
The articular surfaces of the TMJ are covered by fibrocartilage, unlike most other synovial joints.
-
Hyaline cartilage
The articular surfaces of the TMJ are covered by fibrocartilage, unlike most other synovial joints.
-
Elastic cartilage
The articular surfaces of the TMJ are covered by fibrocartilage, unlike most other synovial joints.
-
Dense irregular connective tissue
The articular surfaces of the TMJ are covered by fibrocartilage, unlike most other synovial joints.
-
I find it difficult to answer
The articular surfaces of the TMJ are covered by fibrocartilage, unlike most other synovial joints.
2. Which muscle protrudes the mandible forward (protrusion) during bilateral contraction?
-
Temporalis muscle
Bilateral contraction of the lateral pterygoid muscles draws the articular heads and disks forward.
-
Masseter muscle
Bilateral contraction of the lateral pterygoid muscles draws the articular heads and disks forward.
-
Lateral pterygoid muscle
Bilateral contraction of the lateral pterygoid muscles draws the articular heads and disks forward.
-
Medial pterygoid muscle
Bilateral contraction of the lateral pterygoid muscles draws the articular heads and disks forward.
-
I find it difficult to answer
Bilateral contraction of the lateral pterygoid muscles draws the articular heads and disks forward.
3. In which part of the temporomandibular joint do hinge (rotational) movements occur?
-
In the upper compartment of the joint
Rotational movements around the frontal axis predominantly occur in the lower (disk-mandibular) compartment of the joint.
-
In the lower compartment of the joint
Rotational movements around the frontal axis predominantly occur in the lower (disk-mandibular) compartment of the joint.
-
Simultaneously in both compartments equally
Rotational movements around the frontal axis predominantly occur in the lower (disk-mandibular) compartment of the joint.
-
In the retrodiscal space
Rotational movements around the frontal axis predominantly occur in the lower (disk-mandibular) compartment of the joint.
-
I find it difficult to answer
Rotational movements around the frontal axis predominantly occur in the lower (disk-mandibular) compartment of the joint.
4. Which muscle retracts the mandible backward (retraction)?
-
Anterior belly of the digastric muscle.
Posterior (horizontal) fibers of the temporalis muscle facilitate mandible retraction.
-
Lateral pterygoid muscle
Posterior (horizontal) fibers of the temporalis muscle facilitate mandible retraction.
-
Deep part of the masseter muscle
Posterior (horizontal) fibers of the temporalis muscle facilitate mandible retraction.
-
Posterior fibers of the temporalis muscle
Posterior (horizontal) fibers of the temporalis muscle facilitate mandible retraction.
-
I find it difficult to answer
Posterior (horizontal) fibers of the temporalis muscle facilitate mandible retraction.
5. Which nerve provides the primary sensory innervation to the capsule of the temporomandibular joint?
-
Auriculotemporal nerve
The auriculotemporal nerve (branch of the mandibular nerve) innervates the posterior and lateral compartments of the joint capsule.
-
Buccal nerve
The auriculotemporal nerve (branch of the mandibular nerve) innervates the posterior and lateral compartments of the joint capsule.
-
Facial nerve
The auriculotemporal nerve (branch of the mandibular nerve) innervates the posterior and lateral compartments of the joint capsule.
-
Glossopharyngeal nerve
The auriculotemporal nerve (branch of the mandibular nerve) innervates the posterior and lateral compartments of the joint capsule.
-
I find it difficult to answer
The auriculotemporal nerve (branch of the mandibular nerve) innervates the posterior and lateral compartments of the joint capsule.
6. Which arteries contribute the most to the blood supply of the temporomandibular joint?
-
Facial and lingual arteries
The blood supply is mainly derived from branches of the external carotid artery: the superficial temporal and maxillary arteries.
-
Ascending pharyngeal and occipital arteries
The blood supply is mainly derived from branches of the external carotid artery: the superficial temporal and maxillary arteries.
-
Superficial temporal and maxillary arteries.
The blood supply is mainly derived from branches of the external carotid artery: the superficial temporal and maxillary arteries.
-
Internal carotid and ophthalmic arteries
The blood supply is mainly derived from branches of the external carotid artery: the superficial temporal and maxillary arteries.
-
I find it difficult to answer
The blood supply is mainly derived from branches of the external carotid artery: the superficial temporal and maxillary arteries.
7. Which ligament of the temporomandibular joint limits backward mandible movement, protecting the external auditory meatus?
-
Sphenomandibular ligament
The lateral (temporomandibular) ligament prevents excessive posterior displacement of the articular head.
-
Lateral ligament
The lateral (temporomandibular) ligament prevents excessive posterior displacement of the articular head.
-
Stylomandibular ligament
The lateral (temporomandibular) ligament prevents excessive posterior displacement of the articular head.
-
Pterygospinous ligament
The lateral (temporomandibular) ligament prevents excessive posterior displacement of the articular head.
-
I find it difficult to answer
The lateral (temporomandibular) ligament prevents excessive posterior displacement of the articular head.
8. Where does the superior head of the lateral pterygoid muscle attach?
-
To the angle of the mandible
The superior head of the lateral pterygoid muscle blends into the joint capsule and the anterior edge of the articular disk.
-
To the coronoid process
The superior head of the lateral pterygoid muscle blends into the joint capsule and the anterior edge of the articular disk.
-
To the styloid process
The superior head of the lateral pterygoid muscle blends into the joint capsule and the anterior edge of the articular disk.
-
To the capsule and articular disk of the temporomandibular joint
The superior head of the lateral pterygoid muscle blends into the joint capsule and the anterior edge of the articular disk.
-
I find it difficult to answer
The superior head of the lateral pterygoid muscle blends into the joint capsule and the anterior edge of the articular disk.
9. To which type of joints based on the number of rotational axes does the temporomandibular joint belong?
-
Polyaxial (Three-axis)
The TMJ functions as a polyaxial joint, allowing movements in three planes (vertical, sagittal, frontal).
-
Uniaxial
The TMJ functions as a polyaxial joint, allowing movements in three planes (vertical, sagittal, frontal).
-
Biaxial
The TMJ functions as a polyaxial joint, allowing movements in three planes (vertical, sagittal, frontal).
-
Flat (amphiarthrosis)
The TMJ functions as a polyaxial joint, allowing movements in three planes (vertical, sagittal, frontal).
-
I find it difficult to answer
The TMJ functions as a polyaxial joint, allowing movements in three planes (vertical, sagittal, frontal).
10. Which of the following muscles is involved in depressing the mandible?
-
Masseter muscle
The mylohyoid muscle, when the hyoid bone is fixed, lowers the mandible.
-
Medial pterygoid muscle
The mylohyoid muscle, when the hyoid bone is fixed, lowers the mandible.
-
Mylohyoid muscle
The mylohyoid muscle, when the hyoid bone is fixed, lowers the mandible.
-
Temporalis muscle
The mylohyoid muscle, when the hyoid bone is fixed, lowers the mandible.
-
I find it difficult to answer
The mylohyoid muscle, when the hyoid bone is fixed, lowers the mandible.
11. Where is the venous drainage from the temporomandibular joint directed?
-
Into the facial vein.
Venous blood from joint structures predominantly drains into the pterygoid venous plexus and retromandibular vein.
-
Into the pterygoid venous plexus
Venous blood from joint structures predominantly drains into the pterygoid venous plexus and retromandibular vein.
-
Into the internal jugular vein.
Venous blood from joint structures predominantly drains into the pterygoid venous plexus and retromandibular vein.
-
Into the cavernous sinus.
Venous blood from joint structures predominantly drains into the pterygoid venous plexus and retromandibular vein.
-
I find it difficult to answer
Venous blood from joint structures predominantly drains into the pterygoid venous plexus and retromandibular vein.
12. Which anatomical structure is located directly posterior to the temporomandibular joint?
-
Pterygopalatine fossa
The articular fossa is posteriorly limited by the tympanic part of the temporal bone, which separates the joint from the external acoustic meatus.
-
Mammillary process
The articular fossa is posteriorly limited by the tympanic part of the temporal bone, which separates the joint from the external acoustic meatus.
-
Zygomatic arch
The articular fossa is posteriorly limited by the tympanic part of the temporal bone, which separates the joint from the external acoustic meatus.
-
External acoustic meatus
The articular fossa is posteriorly limited by the tympanic part of the temporal bone, which separates the joint from the external acoustic meatus.
-
I find it difficult to answer
The articular fossa is posteriorly limited by the tympanic part of the temporal bone, which separates the joint from the external acoustic meatus.
13. Where does the medial pterygoid muscle originate?
-
From the pterygoid fossa of the sphenoid bone
The medial pterygoid muscle originates in the pterygoid fossa of the pterygoid process of the sphenoid bone.
-
From the infratemporal crest
The medial pterygoid muscle originates in the pterygoid fossa of the pterygoid process of the sphenoid bone.
-
From the zygomatic arch.
The medial pterygoid muscle originates in the pterygoid fossa of the pterygoid process of the sphenoid bone.
-
From the mastoid process
The medial pterygoid muscle originates in the pterygoid fossa of the pterygoid process of the sphenoid bone.
-
I find it difficult to answer
The medial pterygoid muscle originates in the pterygoid fossa of the pterygoid process of the sphenoid bone.
14. Which part of the articular disk of the temporomandibular joint is the thinnest and avascular?
-
Anterior zone
The central (intermediate) zone of the disk is the thinnest, devoid of blood vessels and nerve endings.
-
Posterior zone
The central (intermediate) zone of the disk is the thinnest, devoid of blood vessels and nerve endings.
-
Intermediate zone (central part)
The central (intermediate) zone of the disk is the thinnest, devoid of blood vessels and nerve endings.
-
Bilaminar zone
The central (intermediate) zone of the disk is the thinnest, devoid of blood vessels and nerve endings.
-
I find it difficult to answer
The central (intermediate) zone of the disk is the thinnest, devoid of blood vessels and nerve endings.
15. The masticatory nerve, which innervates its namesake muscle and the TMJ capsule, is a branch of which nerve?
-
Ophthalmic nerve
The masticatory nerve branches off from the motor root of the mandibular nerve (V3) — the third branch of the trigeminal nerve.
-
Mandibular nerve
The masticatory nerve branches off from the motor root of the mandibular nerve (V3) — the third branch of the trigeminal nerve.
-
Maxillary nerve
The masticatory nerve branches off from the motor root of the mandibular nerve (V3) — the third branch of the trigeminal nerve.
-
Facial nerve
The masticatory nerve branches off from the motor root of the mandibular nerve (V3) — the third branch of the trigeminal nerve.
-
I find it difficult to answer
The masticatory nerve branches off from the motor root of the mandibular nerve (V3) — the third branch of the trigeminal nerve.
16. What is the retrodiscal pad (bilaminar zone) of the temporomandibular joint?
-
Region of dense bone tissue
The bilaminar zone is richly vascularized and innervated, consisting of loose connective tissue, providing nutrition.
-
Pouch with synovial fluid
The bilaminar zone is richly vascularized and innervated, consisting of loose connective tissue, providing nutrition.
-
Thickening of the lateral ligament
The bilaminar zone is richly vascularized and innervated, consisting of loose connective tissue, providing nutrition.
-
Plexus of blood vessels and nerves in loose connective tissue
The bilaminar zone is richly vascularized and innervated, consisting of loose connective tissue, providing nutrition.
-
I find it difficult to answer
The bilaminar zone is richly vascularized and innervated, consisting of loose connective tissue, providing nutrition.
17. What movement occurs in the upper compartment of the temporomandibular joint during mouth opening?
-
Sliding of the articular head and disk over the articular eminence
In the upper joint space, translational movements occur — sliding of the head along with the disk forward onto the articular eminence.
-
Rotation of the articular head around the frontal axis
In the upper joint space, translational movements occur — sliding of the head along with the disk forward onto the articular eminence.
-
Rotation of the articular head around the vertical axis
In the upper joint space, translational movements occur — sliding of the head along with the disk forward onto the articular eminence.
-
Rigid fixation of the disk in the fossa
In the upper joint space, translational movements occur — sliding of the head along with the disk forward onto the articular eminence.
-
I find it difficult to answer
In the upper joint space, translational movements occur — sliding of the head along with the disk forward onto the articular eminence.
18. The sphenomandibular ligament attaches to:
-
Condyle process
The sphenomandibular ligament extends from the spine of the sphenoid bone to the lingula of the mandible.
-
Coronoid process
The sphenomandibular ligament extends from the spine of the sphenoid bone to the lingula of the mandible.
-
Lingula of the mandible
The sphenomandibular ligament extends from the spine of the sphenoid bone to the lingula of the mandible.
-
Angle of the mandible
The sphenomandibular ligament extends from the spine of the sphenoid bone to the lingula of the mandible.
-
I find it difficult to answer
The sphenomandibular ligament extends from the spine of the sphenoid bone to the lingula of the mandible.
19. Which muscle causes lateral shift (lateralotrusion) of the mandible during unilateral contraction?
-
Lateral pterygoid muscle of the same side
During unilateral contraction, the lateral pterygoid muscle shifts the mandible to the opposite side.
-
Lateral pterygoid muscle of the opposite side
During unilateral contraction, the lateral pterygoid muscle shifts the mandible to the opposite side.
-
Digastric muscle
During unilateral contraction, the lateral pterygoid muscle shifts the mandible to the opposite side.
-
Temporalis muscle of the opposite side
During unilateral contraction, the lateral pterygoid muscle shifts the mandible to the opposite side.
-
I find it difficult to answer
During unilateral contraction, the lateral pterygoid muscle shifts the mandible to the opposite side.
20. Where does the masseter muscle (m. masseter) attach?
-
To the lingula of the mandible
The masseter muscle attaches to the masticatory tuberosity on the external surface of the angle of the mandible.
-
To the pterygoid fossa
The masseter muscle attaches to the masticatory tuberosity on the external surface of the angle of the mandible.
-
To the mental spine
The masseter muscle attaches to the masticatory tuberosity on the external surface of the angle of the mandible.
-
To the masseteric tuberosity at the angle of the mandible
The masseter muscle attaches to the masticatory tuberosity on the external surface of the angle of the mandible.
-
I find it difficult to answer
The masseter muscle attaches to the masticatory tuberosity on the external surface of the angle of the mandible.
Retake this quiz?
Your current progress will be reset.