the Paranasal Sinuses: nerves and vessels

Question 1

Identify

Answer 1

1. Frontal sinus
2. Ethmoid sinuses
3. Maxillary sinus

Question 2

Identify

Answer 2

1. Frontal sinus
2. Ethmoid sinuses
3. Maxillary sinus

Question 3

Identify

Answer 3

1. Frontal sinus
2. Ethmoid sinuses
3. Maxillary sinus

Question 4

Identify

Answer 4

1. Frontal sinus
2. Ethmoid sinuses
3. Sphenoid sinus

Question 5

Location of frontal sinus

Answer 5

Within frontal bone

Question 6

Arterial supply of frontal sinus

Answer 6

Ophthalmic branches (anterior ethmoidal, supraorbital, supratrochlear arteries)

Question 7

Nerve supply of frontal sinus

Answer 7

ophthalmic division of trigeminal nerve

Question 8

Location of maxillary sinus

Answer 8

Within maxillary bone

Question 9

Arterial supply of maxillary sinus

Answer 9

Maxillary branches

Question 10

Nerve supply of maxillary sinus

Answer 10

Within Maxillary division of trigeminal

Question 11

Location of ethmoid sinus

Answer 11

Within ethmoid bone

Question 12

Arterial supply of ethmoid sinus

Answer 12

Ophthalmic and maxillary branches

Question 13

Nerve supply of ethmoid sinus

Answer 13

Ophthalmic and maxillary division of trigeminal

Question 14

Vascular Supply of the Frontal Sinuses

What are the 3 branches that supply frontal sinus?

Answer 14

Anterior ethmoidal artery

Supraorbital artery

supratrochlear artery

→ coming from Ophthalmic a. (from internal carotid)

Question 15

Vascular Supply of the Frontal Sinuses

Identify 1 → 3

Answer 15

1. Supraorbital a.
2. Supratrochlear a.
3. Frontal sinus

Question 16

Vascular Supply of the Frontal Sinuses

Identify 4 → 5

Answer 16

4. Lacrimal a.
5. Optic n

Question 17

Vascular Supply of the Frontal Sinuses

Identify 6 - 7

Answer 17

6. Posterior ethmoid a.
7. Anterior ethmoid a.

Question 18

Nerve Supply of the Frontal Sinuses

→ What are the 2 nerves that supply frontal sinuses? Their sources?

Answer 18

Ophthalmic division of trigeminal

→ Supraorbital & supratrochlear nerves

Question 19

Nerve Supply of the Frontal Sinuses

→ Supraorbital nerve passes between ___ and ____

Answer 19

levator palpebrae superioris m. and periosteum of orbit

Question 20

Nerve Supply of the Frontal Sinuses

→ Identify 1 → 3

Answer 20

1. Supraorbital n.
2. Supratrochlear n.
3. Frontal sinus

Question 21

Nerve Supply of the Frontal Sinuses

→ Identify 4 → 6

Answer 21

4. Lacrimal n.
5. Frontal n.
6. Nasociliary n.

Question 22

Nerve Supply of the Frontal Sinuses

→ Identify 7 -8

Answer 22

7. Posterior ethmoid n.
8. Anterior ethmoid n.

Question 23

Vascular Supply of the Ethmoid Sinuses

Identify 1 - 2

Answer 23

1. Anterior ethmoid a.
2. Posterior ethmoid a.

Question 24

Vascular Supply of the Ethmoid Sinuses

Identify 3 - 4

Answer 24

3. Sphenopalatine a.
4. Posterior lateral nasal a.

Question 25

**Vascular Supply of the Ethmoid Sinuses** Arterial branches that supply ethmoid sinuses?

Answer 25

1. Anterior ethmoidal a. (Ophthalmic a. (from internal carotid)) 2. Posterior ethmoidal a Ophthalmic a. (from internal carotid)) 3. Posterior lateral nasal branches (Sphenopalatine a. (from maxillary a. from external carotid))

Question 26

**Vascular Supply of the Ethmoid Sinuses** Source of Posterior lateral nasal branches a.

Answer 26

Sphenopalatine a. (from maxillary a. from external carotid)

Question 27

**Vascular Supply of the Ethmoid Sinuses** Posterior lateral nasal branches a. → Anastomose with ___ to help supply ethmoid air cells and sphenoid sinus

Answer 27

ethmoidal aa.

Question 28

**Nerve Supply of the Ethmoid Sinuses** Nerve Branches that supply ethmoid sinuses

Answer 28

1. Anterior ethmoid 2. Posterior ethmoid 3. Posterior lateral superior nasal 4. Posterior lateral inferior nasal

Question 29

**Nerve Supply of the Ethmoid Sinuses** Identify 1 - 2

Answer 29

1. Anterior ethmoid n. 2. Posterior ethmoid n.

Question 30

**Nerve Supply of the Ethmoid Sinuses** Identify 3 - 4

Answer 30

3. Pterygopalatine ganglion 4. Posterior lateral superior nasal n.

Question 31

**Nerve Supply of the Ethmoid Sinuses** Identify 5 - 7

Answer 31

5. Lesser palatine n. 6. Greater palatine n. 7. Posterior lateral inferior nasal n.

Question 32

**Vascular Supply of the Maxillary Sinuses** 3 branches? Their source(s)?

Answer 32

Maxillary a. from external carotid give rise to 1. Anterior superior alveolar 2. Middle superior alveolar 3. Posterior superior alveolar

Question 33

**Vascular Supply of the Maxillary Sinuses** Identify 1

Answer 33

1. Maxillary a.

Question 34

**Vascular Supply of the Maxillary Sinuses** Identify 2

Answer 34

2. Infraorbital a.

Question 35

**Vascular Supply of the Maxillary Sinuses** Identify 3 - 5

Answer 35

3. Posterior superior alveolar a. 4. Middle superior alveolar a. 5. Anterior superior alveolar a.

Question 36

**Vascular Supply of the Maxillary Sinuses** Anterior superior alveolar a. → Arises from _____ after it passes through inferior orbital fissure and into infraorbital canal and descends via alveolar canals to supply sinus

Answer 36

infraorbital a. of maxillary

Question 37

**Vascular Supply of the Maxillary Sinuses** Anterior superior alveolar a. → Arises from infraorbital a. of maxillary after it passes through inferior orbital fissure and into infraorbital canal and descends via ___ to supply sinus

Answer 37

alveolar canals

Question 38

**Vascular Supply of the Maxillary Sinuses** Middle superior alveolar a. → When present, it arises from infraorbital a. of maxillary after passing through ____ and into infraorbital canal and descends via alveolar canals to supply sinus

Answer 38

inferior orbital fissure

Question 39

**Vascular Supply of the Maxillary Sinuses** Posterior superior alveolar a. → Arises from 3rd part of maxillary a. before maxillary a. enters\_\_\_\_\_

Answer 39

pterygopalatine fossa (and then branch)

Question 40

**Vascular Supply of the Maxillary Sinuses** Posterior superior alveolar a. → Arises from 3rd part of maxillary a. before maxillary a. enters pterygopalatine fossa and branch → Enters _____ to supply sinus

Answer 40

infratemporal surface of maxilla

Question 41

**Nerve Supply of the Maxillary Sinuses** Identify 1

Answer 41

1. Maxillary n.

Question 42

**Nerve Supply of the Maxillary Sinuses** Identify 2

Answer 42

2. Posterior superior alveolar n.

Question 43

**Nerve Supply of the Maxillary Sinuses** Identify 3

Answer 43

3. Infraorbital n.

Question 44

**Nerve Supply of the Maxillary Sinuses** Identify 4 - 5

Answer 44

4. Middle superior alveolar n. 5. Anterior superior alveolar n.

Question 45

**Nerve Supply of the Maxillary Sinuses** Source of Anterior superior alveolar, Middle superior alveolar, Posterior superior alveolar nerves?

Answer 45

Maxillary division of trigeminal nerve

Question 46

**Nerve Supply of the Maxillary Sinuses** Anterior superior alveolar nerve → Branches from (1)\_\_\_ as it travels in infraorbital canal → As it descends to form (2)\_\_\_\_, it innervates part of maxillary sinus

Answer 46

1. infraorbital n. 2. superior dental plexus

Question 47

**Nerve Supply of the Maxillary Sinuses** Middle superior alveolar nerve → When present, it branches from infraorbital n. as it travels in (1)\_\_\_\_ As it descends to form superior dental plexus, it innervates part of (2)\_\_\_\_

Answer 47

1. infraorbital canal 2. maxillary sinus

Question 48

**Nerve Supply of the Maxillary Sinuses** Posterior superior alveolar nerve → Arises in \_\_\_

Answer 48

pterygopalatine fossa

Question 49

**Nerve Supply of the Maxillary Sinuses** Posterior superior alveolar nerve → Arises in pterygopalatine fossa and travels laterally through ____ to enter infratemporal fossa where it enters infratemporal surface of maxilla

Answer 49

pterygomaxillary fissure

Question 50

**Nerve Supply of the Maxillary Sinuses** Posterior superior alveolar nerve → Arises in pterygopalatine fossa and travels laterally through pterygomaxillary fissure to enter \_\_\_\_

Answer 50

infratemporal fossa where it enters infratemporal surface of maxilla

Question 51

**Nerve Supply of the Maxillary Sinuses** What is superior dental plexus? How is it formed?

Answer 51

The superior dental plexus is a nerve plexus which supplies the upper jaw. -→ Formed by posterior superior alveolar nerve, middle superior alveolar nerve, and anterior superior alveolar nerve

Question 52

**Vascular Supply of the Sphenoid Sinuses** Identify 1 - 2

Answer 52

1. Posterior ethmoid a. 2. Sphenopalatine a.

Question 53

**Vascular Supply of the Sphenoid Sinuses** Identify 3

Answer 53

3. Posterior lateral nasal a.

Question 54

**Vascular Supply of the Sphenoid Sinuses** Source of posterior ethmoidal artery

Answer 54

Ophthalmic a. (from internal carotid)

Question 55

**Vascular Supply of the Sphenoid Sinuses** posterior ethmoidal artery → Passes through posterior ethmoid foramen to enter canal where it supplies\_\_\_ and \_\_\_\_

Answer 55

sphenoid sinus and posterior ethmoid air cells

Question 56

**Vascular Supply of the Sphenoid Sinuses** Source of Posterior lateral nasal branches

Answer 56

Sphenopalatine a. from maxillary (from external carotid)

Question 57

**Vascular Supply of the Sphenoid Sinuses** Posterior lateral nasal branches → anastomose with ethmoidal aa. to help supply ____ and \_\_\_\_

Answer 57

sphenoid sinus and ethmoid air cells

Question 58

**Nerve Supply of the Sphenoid Sinuses** Identify 1 → 2

Answer 58

1. Frontal sinus 2. Ethmoid sinus

Question 59

**Nerve Supply of the Sphenoid Sinuses** Identify 3

Answer 59

3. Posterior ethmoid n.

Question 60

**Nerve Supply of the Sphenoid Sinuses** Identify 4

Answer 60

4. Pterygopalatine ganglion

Question 61

**Nerve Supply of the Sphenoid Sinuses** Identify 5

Answer 61

5. Orbital branch from pterygopalatine ganglion

Question 62

**Nerve Supply of the Sphenoid Sinuses** Identify 6 - 7

Answer 62

6. Nerve of the pterygoid canal 7. Nasopalatine n.

Question 63

**Nerve Supply of the Sphenoid Sinuses** Identify 8

Answer 63

8. Posterior lateral superior nasal n.

Question 64

**Nerve Supply of the Sphenoid Sinuses** Identify 9 - 10

Answer 64

9. Lesser palatine n. 10. Greater palatine n.

Question 65

**Nerve Supply of the Sphenoid Sinuses** Source of Orbital branch from pterygopalatine ganglion

Answer 65

Maxillary division of trigeminal