Submandibular region l General anatomy MCQ ( multiple choice question) for dental student
MCQ on submandibular region and gland for general human anatomy in dentistry
1. Submandibular gland is situated in:
A.
Digastric triangle
B.
Carotid triangle
C.
Muscular triangle
D.
Deep to hyoglossus
2. Sublingual gland lies:
a.
Superior to mylohyoid
b.
Inferior to mylohyoid
c.
Deep to genioglossus
d.
Deep to geniohyoid
3. Submandibular gland is divided into superficial and deep part by:
a. Stylohyoid
b. Geniohyoid
c. Digastric
d. Mylohyoid
4. The nerve supplying submandibular gland are:
a. V
b. IX
c. VII
d. XII
5. Deep surface of hyoglossus is related to:
A.
Lingual nerve
B.
Hypoglossal nerve
C.
Submandibular ganglion
D.
Glossopharyngeal nerve
6. Mylohyoid muscle:
A.
Arises from hyoid bone
B.
Developed from 2nd pharyngeal arch
C.
Depresses the hyoid
D.
Elevates the hyoid
7. Oral diaphragm/floor of mouth is formed by:
a. Genioglossus
b. Mylohyoid
c. Orbicularis oris
d. Buccinator
8. Which of the following muscle has dual nerve supply?
a. Digastric
b. Lateral
pterygoid
c. Massetor
d. Temporalis
9. The action of digastric muscle is:
A.
Depression of mandible
B.
Protrusion of mandible
C.
Side-to-side movement
D.
Depressing the floor of mouth
10. All of the following muscles are elevator of hyoid bone except:
a. Digastric
b. Hyoglossus
c. Mylohyoid
d. Geniohyoid
11. The digastric muscle:
A.
depresses the hyoid bone
B.
is attached to the inner surface of the
mandible and the mastoid process of the temporal bone
C. both A and B
D. neither A nor B
12. Which nerve supplies the posterior belly of the digastric muscle:
A. C1
B. ansa cervicalis
C. facial
D. hypoglossal
E. glossopharyngeal
13. Which of the following is not muscle of facial expression:
A. buccinator
B. occipitalis
C. risorius
D. zygpmaticus major
E.
anterior belly of the digastric
14. Which of the following muscles does not help to open the jaw:
A.
medial pterygoid muscle
B.
lateral pterygoid muscle
C.
geniohyoid muscle
D. mylohyoid muscle
E. anterior belly of the digastric muscle
15. The branch of the external carotid artery that passes posterosuperiorly along the inferior (lower) border of the posterior belly of the digastric muscle is the
A. superior thyroid
B. lingual
C. maxillary
D. occipital
E. posterior auricular
16. Which of the following arteries arises from the external carotid and forms a loop before passing deep to the hyoglossus muscle?
A. Posterior auricular.
B. Facial.
C. Lingual.
D.
Occipital.
E. Ascending
pharyngeal.
17- The intermediate tendon of digastric muscle is enclosed by the tendon of:
a) Hyoglossus
b) Myclohyoid
c) Stylohoid
d) Styloglossus
e)
Sternocleidomastoid
18. Which nerve supplies the geniohyoid muscle:
A. C1
B. ansa
cervicalis
C. facial
D. hypoglossal
E. glossopharyngeal
19- The sublingual salivary gland rests on which muscle?
A.
Anterior belly of digastrics
B.
Mylohyoid
C.
Stylohoid
D.
Superior belly of omohyoid
E.
Thyrohyoid
20) Regarding to the submandibular region
A.
Mylohyoid muscle can elevate the mandible
B.
The anterior belly of digastric is
supplied by the trigeminal nerve
C.
The lingual artery runs superficial to
hyoglossus muscle
D.
The hypoglossal nerve runs with the
lingual artery
E.
The submandibular gland lies entirety
superficial to mylohyoid
Submandibular salivary gland
Site:
Is a large salivary gland (1/2 the size of parotid), wedged between mandible & mylohyoid muscle in the submandibular fossa of the mandible.
Extensions:(superficial
part)
Inferiorly: Overlaps intermediate tendon of digastric.
In front: To mental foramen.
Behind: To angle of the mandible, separated from parotid gland by stylomandibular ligament.
Parts
2 parts:
1.
Superficial part: Superficial
to mylohyoid muscle.
2.
Deep part: Deep to
mylohyoid muscle
ü Both
parts are continuous with each other along the posterior border of mylohyoid
muscle.
Relations:
A- Superficial part: three surfaces.
1) Inferolateral surface: Is related to:
¦ Skin,
fascia, and platysma.
¦ The
submandibular lymph nodes lie on it.
¦ It
is crossed by:
1. Cervical branch of facial nerve. 2.
Facial vein
¦ Its
posterior end is grooved by the facial artery.
2) Lateral surface: Is related
to:
a.
Submandibular fossa of
the mandible.
b.
Facial artery between it
and the mandible.
c.
Insertion of medial
pterygoid muscle.
3) Medial surface: is related
to:
¦ Anteriorly:
1)
Anterior belly of
digastric.
2)
Myelohyoid muscle, N.
& A.
¦ Postetiolv: Posterior belly of digastric & Stylohyoid.
¦ In the middle: - Hyoglossus
muscle & its lateral relations.
-
B) Deep part:
¦ It
appears as a tongue like process from the medial surface.
¦ It
lies between:
§ Mylohyoid
(superficially) & hyoglossus (deeply).
§ Lingual
nerve (above) & hypoglossal nerve (below) .
¦ Submandibular
duct arises from its lateral part.
Submandibular (Wharton's) duct:
¦ beginning :
arises from the deep part of the gland (5 cm).
¦ Course :
It runs forwards and upwards between :
1.
Mylohyoid (superficially)
& hyoglossus(deeply).
2.
Lingual nerve (above)
& hypoglossal nerve (below).
-
At the anterior border
of hyoglossus muscle, the lingual nerve crosses the duct twice relations)
superficial, then below and finally deep to the duct.
¦ opening :
opens in the summit of sublingual papilla (on
side of the frenulum linguae).
Nerve supply:
- Sensory: Lingual nerve.
- Sympathetic:
Plexus around the facial artery.
Applied anatomy: (Submandibular gland stone)
1- Its
secretion is thick & viscid.
2- Its
duct is narrower & runs against gravity.
Submandibular Ganglion
¦ Site:
In submandibular region, suspended from the lingual nerve on the outer surface of hyoglossus.
¦ Roots:
Sensory root: Lingual nerve.
Parasympathetic root: Chorda tympani N.
Sympathetic root: Plexus around facial A.
¦ Branches:
Parasympathetic, sympathetic & sensory to: submandibular & sublingual glands.
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