78 - Nasal cavity - nerves & vessels

Question 1

Arterial Supply of the Nasal Cavity

Identify 1 → 4

Answer 1

1. Sphenopalatine a.
2. Posterior ethmoid a.
3. Anterior ethmoid a.
4. Greater palatine a.

Question 2

Arterial Supply of the Nasal Cavity

Identify 1 → 4

Answer 2

1. Sphenopalatine a.
2. Posterior ethmoid a.
3. Anterior ethmoid a.
4. Greater palatine a.

Question 3

Arterial Supply of the Nasal Cavity

Identify 5

Answer 3

5. Septal branch of superior labral a.

Question 4

Arterial Supply of the Nasal Cavity

Source of Anterior ethmoid artery

Answer 4

Ophthalmic a.

Question 5

Arterial Supply of the Nasal Cavity

Anterior ethmoid artery

→ travels with nasociliary n. through (1)____ and enters anterior cranial fossa, where it gives rise to meningeal branch and nasal branches that descend into nasal cavity to supply (2) ___ and ____ before giving rise to external nasal a., which supplies nose

Answer 5

1. anterior ethmoidal foramen
2. lateral wall and septum of nose

Question 6

Arterial Supply of the Nasal Cavity

Source of POSTERIOR ethmoid artery

Answer 6

Ophthalmic a.

Question 7

Arterial Supply of the Nasal Cavity

Posterior ethmoid artery

→ Travels through posterior ethmoidal foramen to enter anterior cranial fossa, where it gives rise to (1)____ and ____ that descend into nasal cavity through (2)____ to supply part of lateral wall near superior nasal concha and posterosuperior portion of nasal septum

Answer 7

1. meningeal branch and nasal branches
2. cribriform plate

Question 8

Arterial Supply of the Nasal Cavity

Source of Sphenopalatine a.

Answer 8

3rd part of maxillary a.

Question 9

Arterial Supply of the Nasal Cavity

Sphenopalatine a.

→ After passing through sphenopalatine foramen, enters nasal cavity where it gives rise to ____

Answer 9

posterosuperior nasal branches

Question 10

Arterial Supply of the Nasal Cavity

septal branch of superior labial artery travels along (1)____

→ it is a major blood supply to (2)___

Answer 10

1. Nasal septum
2. Anterior part of nasal septum

Question 11

Arterial Supply of the Nasal Cavity

Sphenopalatine a.

→ Posterosuperior lateral branch supplies ____ (3)

→ posterosuperior medial branch continues along _____

Answer 11

→ nasal concha, mucous membranes, and lateral wall

→ nasal septum (to enter hard palate via incisive canal)

Question 12

Arterial Supply of the Nasal Cavity

Sphenopalatine a.

→ posterosuperior medial branch continues along nasal septum to enter _____

Answer 12

hard palate via incisive canal

Question 13

Arterial Supply of the Nasal Cavity

Source of Greater palatine artery

Answer 13

3rd part of maxillary artery

Question 14

Arterial Supply of the Nasal Cavity

Greater palatine a.

→ Descending palatine travels in palatine canal, where it divides into (1)____ and ____, which anastomoses with terminal branch of (2)____, which exits incisive foramen

Answer 14

1. lesser palatine a. and greater palatine a.
2. sphenopalatine a.

Question 15

Arterial Supply of the Nasal Cavity

Source of septal branch of superior labial artery

Answer 15

Facial artery

Question 16

Sensory Innervation of the Nasal Cavity

→ Identify 1 - 2

Answer 16

1. External nasal branches of anterior ethmoid n.
2. Lateral internal nasal branch of anterior ethmoid n

Question 17

Sensory Innervation of the Nasal Cavity

→ Identify 3

Answer 17

3. Medial internal nasal branch of anterior ethmoid n.

Question 18

Sensory Innervation of the Nasal Cavity

→ Source of anterior ethmoidal nerve

Answer 18

Nasociliary n. on medial wall of orbit

Question 19

Sensory Innervation of the Nasal Cavity

anterior ethmoidal nerve

→ Enters anterior ethmoid foramen and travels through canal to enter anterior cranial fossa and descends toward nasal cavity, providing innervation to _______ (3)

Answer 19

• anterior parts of middle and inferior concha
• region anterior to nasal concha

Question 20

Sensory Innervation of the Nasal Cavity

Maxillary division of trigeminal

→ Sensory branch that travels along lateral wall of cavernous sinus to enter pterygopalatine fossa via ____

Answer 20

foramen rotundum

Question 21

Sensory Innervation of the Nasal Cavity

Maxillary division of trigeminal

→ Sensory branch that travels along lateral wall of cavernous sinus to enter pterygopalatine fossa via foramen rotundum

→ Within pterygopalatine fossa, it gives rise to 4 branches which are __

Answer 21

• Infraorbital—this is continuation of the maxillary
• Posterior superior alveolar
• Zygomatic
• Ganglionic

Question 22

Sensory Innervation of the Nasal Cavity

Source of infraorbital nerve

Answer 22

Maxillary division of trigeminal

Question 23

Sensory Innervation of the Nasal Cavity

Infraorbital nerve

→ Passes through (1)_____ to enter orbit and travels anteriorly through infraorbital groove and infraorbital canal, and exits onto face via (2)____

Answer 23

1. inferior orbital fissure
2. infraorbital foramen

Question 24

Sensory Innervation of the Nasal Cavity

Infraorbital nerve

→ Passes through inferior orbital fissure to enter orbit and travels anteriorly through ___ and ____, and exits onto face via infraorbital foramen

Answer 24

infraorbital groove and infraorbital canal

Question 25

**Sensory Innervation of the Nasal Cavity** Infraorbital nerve → Passes through inferior orbital fissure to enter orbit and travels anteriorly through infraorbital groove and infraorbital canal, and exits onto face via infraorbital foramen → While in infraorbital canal it gives rise to \_\_\_\_., which has a small branch that supplies nasal cavity in region of the inferior meatus and inferior corresponding portion of nasal septum

Answer 25

anterior superior alveolar n

Question 26

**Sensory Innervation of the Nasal Cavity** Infraorbital nerve → Passes through inferior orbital fissure to enter orbit and travels anteriorly through infraorbital groove and infraorbital canal, and exits onto face via infraorbital foramen → While in infraorbital canal it gives rise to anterior superior alveolar n., which has a small branch that supplies nasal cavity in region of ___ and \_\_\_\_

Answer 26

the inferior meatus and inferior corresponding portion of nasal septum

Question 27

**Sensory Innervation of the Nasal Cavity** Identify 1 → 3

Answer 27

1. Nasopalatine n. 2. Pterygopalatine ganglion 3. Posterior superior lateral nasal n

Question 28

**Sensory Innervation of the Nasal Cavity** Identify 4

Answer 28

4. Posterior inferior lateral nasal n.

Question 29

**Sensory Innervation of the Nasal Cavity** Identify 5

Answer 29

5. Greater palatine n.

Question 30

**Sensory Innervation of the Nasal Cavity** Source of nasopalatine nerve

Answer 30

Pterygopalatine ganglion in pterygopalatine fossa

Question 31

**Sensory Innervation of the Nasal Cavity** Source of nasopalatine nerve → Passes through ______ to enter nasal cavity and travels along superior portion of nasal cavity to nasal septum where it travels anteroinferiorly to incisive canal supplying septum

Answer 31

sphenopalatine foramen

Question 32

**Sensory Innervation of the Nasal Cavity** Source of nasopalatine nerve → Passes through sphenopalatine foramen to enter nasal cavity and travels along superior portion of nasal cavity to _____ where it travels anteroinferiorly to incisive canal supplying septum

Answer 32

nasal septum

Question 33

**Sensory Innervation of the Nasal Cavity** Source of nasopalatine nerve → Passes through sphenopalatine foramen to enter nasal cavity and travels along superior portion of nasal cavity to nasal septum where it travels anteroinferiorly to ____ supplying septum

Answer 33

incisive canal

Question 34

**Sensory Innervation of the Nasal Cavity** Source of Posterior inferior lateral nasal branch of greater palatine

Answer 34

Pterygopalatine ganglion in pterygopalatine fossa

Question 35

**Sensory Innervation of the Nasal Cavity** Posterior inferior lateral nasal branch of greater palatine → Passes through (1)\_\_\_\_\_ to enter hard palate via greater palatine foramen and descends in palatine canal, giving rise to posteroinferior nasal branch, which supplies (2)\_\_\_\_\_

Answer 35

1. palatine canal 2. posterior part of lateral wall of nasal cavity in region of middle meatus

Question 36

**Sensory Innervation of the Nasal Cavity** Source of Posterior superior nasal nerve

Answer 36

Pterygopalatine ganglion in pterygopalatine fossa

Question 37

**Sensory Innervation of the Nasal Cavity** Posterior superior nasal nerve → Passes through ____ to enter nasal cavity and branches into

Answer 37

sphenopalatine foramen

Question 38

**Sensory Innervation of the Nasal Cavity** Posterior superior nasal nerve → Passes through sphenopalatine foramen to enter nasal cavity and branches into __ (2)

Answer 38

Posterior medial superior nasal Posterior lateral superior nasal

Question 39

**Sensory Innervation of the Nasal Cavity** Source of Posterior superior lateral nasal

Answer 39

Posterior superior nasal from pterygopalatine ganglion

Question 40

**Sensory Innervation of the Nasal Cavity** Source of Posterior superior lateral nasal → Supplies posterosuperior portion of lateral wall of nasal cavity in the region of \_\_\_\_

Answer 40

superior and middle concha

Question 41

**Sensory Innervation of the Nasal Cavity** Posterior superior medial nasal → Supplies \_\_\_

Answer 41

posterior portion of nasal septum