Unit I: Mandible and Associated Structures

Question 1

This is the largest and sturdiest facial bone

Answer 1

Mandible (lower jaw)

Question 2

The large horizontal part of the mandible

Answer 2

Body

Question 3

The upper border of the body of the mandible containing the tooth sockets

Answer 3

Alveolar process

Question 4

Another name for tooth sockets

Answer 4

Alveoli

Question 5

Vertically ascending part of the mandible

Answer 5

Ramus

Question 6

This is found at the POSTERIOR terminus of the body

Answer 6

Angle

Question 7

This articulates with the temporal bone to form the temporomandibular joint

Answer 7

Condylar process

Question 8

Area of attachment for muscles of mastication

Answer 8

Coronoid process

Question 9

This is a sydrome in which there is misalignment of the temporomandibular joint . It is one of the major causes of headaches and it puts abnormal traction on the muscles.

Answer 9

Temporomandibular joint sydrome (TMJ)

Question 10

This is found on the INTERNAL surface of the mandible and is the origin of the genioglossus muscle

Answer 10

Superior mental (genial) spine

Question 11

This is found on the INTERNAL surface of the mandible and is the origin of the geniohyoid muscle

Answer 11

Inferior mental (genial) spine

Question 12

Located on the INTERNAL surface of the mandible and is the origin of the anterior belly of the digastric

Answer 12

Digastric fossa

Question 13

Located on the INTERNAL surface of the mandible and is the origin of the mylohyoid muscle. Ridge on inner surface of the mandible/floor of the mouth.

Answer 13

Mylohyoid line

Question 14

Found on the INTERNAL surface of the mandible and is the location of the sublingual gland

Answer 14

Sublingual fossa

Question 15

This is located on the INTERNAL surface of the mandible and is the location of part of the submandibular gland

Answer 15

Submandibular fossa

Question 16

Origin of the Digastric muscle

Answer 16

1) posterior belly–mastoid process

2) anterior belly–digastric fossa

Question 17

Insertion of the Digastric muscle

Answer 17

Both bellies insert into the hyoid bone by an intermediate tendon that connects them together. The intermediate tendon is strapped to the hyoid bone by a fibrous loop

Question 18

Nerve supply to the Digastric

Answer 18

1) posterior belly–cervical branch of the facial nerve (CN VII)
2) anterior belly–nerve to mylohyoid (CN V)

Question 19

Function of the Digastric muscle

Answer 19

1) Elevates the hyoid bone

2) Depresses the mandible when hyoid is fixed

Question 20

Origin of the Mylohyoid muscle

Answer 20

Mylohyoid line

Question 21

Insertion of the Mylohyoid muscle

Answer 21

1) body of hyoid bone

2) median raphe

Question 22

Where fibers from two sides come together and interweave

Answer 22

Raphe

Question 23

Nerve supply to the Mylohyoid muscle

Answer 23

Nerve to Mylohyoid (CN V)

Question 24

Function of the Mylohyoid muscle

Answer 24

Elevates hyoid bone and floor of mouth

Question 25

Origin of Geniohyoid

Answer 25

Inferior mental spine

Question 26

Insertion of Geniohyoid

Answer 26

Body of hyoid bone

Question 27

Nerve supply to Geniohyoid

Answer 27

C1 fibers through hypoglossal nerve

Question 28

Function of Geniohyoid

Answer 28

Elevates hyoid bone and tongue

Question 29

Origin of Genioglossus

Answer 29

Superior mental spine

Question 30

Insertion of Genioglossus

Answer 30

Tip and entire undersurface of tongue

Question 31

Nerve supply to Genioglossus

Answer 31

Hypoglossal nerve

Question 32

Function of Genioglossus

Answer 32

1) Draws tongue forward | 2) Protrudes tip of tongue

Question 33

Origin of Hyoglossus

Answer 33

1) Body of hyoid bone | 2) Greater horn of hyoid bone (on upper surface)

Question 34

Insertion of Hyoglossus

Answer 34

Sides of tongue

Question 35

Nerve supply to Hyoglossus

Answer 35

Hypoglossal nerve

Question 36

Function of Hyoglossus

Answer 36

Draws tongue downward

Question 37

A small portion of the Hypglossus may take origin from the lesser horn of the hyoid bone. This muscle slip is called this

Answer 37

Chondroglossus

Question 38

Origin of Styloglossus

Answer 38

Styloid process

Question 39

Insertion of Styloglossus

Answer 39

sides of tongue

Question 40

Nerve supply to Styloglossus

Answer 40

Hypoglossal nerve

Question 41

Function of Styloglossus

Answer 41

Draws tongue upward and backward

Question 42

Origin of Stylohyoid

Answer 42

Styloid process

Question 43

Insertion of Stylohyoid

Answer 43

Body of hyoid bone

Question 44

Nerve supply to Stylohyoid

Answer 44

Facial nerve

Question 45

Function of Stylohyoid

Answer 45

Elevates hyoid bone and tongue

Question 46

This is one of the three large paired salivary glands. It wraps around the POSTERIOR border of the Mylohyoid

Answer 46

Submandibular gland

Question 47

The submandibular gland consists of TWO parts

Answer 47

1) Superficial part | 2) Deep part

Question 48

This part of the submandibular gland is large and lies WITHIN the submandibular triangle and in the submandibular fossa

Answer 48

Superficial part

Question 49

This part of the submandibular gland is small and lies SUPERIOR to the Mylohyoid muscle

Answer 49

Deep part

Question 50

This is 5cm long and opens into the oral cavity on the sublingual caruncle

Answer 50

Submandibular duct

Question 51

This is located lateral to the frenulum of the tongue

Answer 51

Sublingual caruncle

Question 52

Innervation of the Submandibular gland

Answer 52

Parasympathetic fibers from the FACIAL nerve via the Submandibular ganglion

Question 53

This gland is the SMALLEST of the three major salivary glands. IT lies SUPERIOR to the Mylohyoid muscle in the sublingual fossa.

Answer 53

Sublingual gland

Question 54

This empties into the floor of the mouth by 12 short ducts located along the sublingual fold

Answer 54

Sublingual gland

Question 55

Innervation of the Sublingual gland

Answer 55

Parasympathetic fibers from the facial nerve via the submandibular ganglion

Question 56

Nerves associated with the mandible

Answer 56

1) Lingual nerve 2) Glossopharyngeal nerve 3) Hypoglossal nerve

Question 57

Blood vessels associated with the mandible

Answer 57

1) Ligual artery 2) Lingual vein 3) Facial artery 4) Facial vein

Question 58

Lymph nodes associated with the mandible

Answer 58

1) Submandibular lymph nodes | 2) Submental lymph nodes