the common carotids and infra temporal fossa

Question 1

where is most of the blood supply to the head and neck derived from?

Answer 1

the common carotid arteries

Question 2

describe the branching pattern of the common carotid arteries?

Answer 2

typically the only branches of the common carotids are the terminal branches of the internal and external carotid arteries

Question 3

what are the regional branches of the external carotid artery?

Answer 3

anterior, posterior, deep and terminal branches

Question 4

where do posterior branches of the external carotid artery supply?

Answer 4

the scalp

Question 5

where do deep branches of the external carotid artery supply?

Answer 5

they contribute to the blood supply of the pharynx

Question 6

where do the anterior branches of the external carotid artery supply?

Answer 6

the thyroid gland, structures. of the oral cavity and soft tissues of the face

Question 7

where does the external carotid artery end and what are the terminal branches?

Answer 7

ends in the parotid gland

terminal branches are the superficial temporal artery and maxillary artery

Question 8

where does the superficial temporal artery supply?

Answer 8

the lateral side of the face and scalp

Question 9

where does the maxillary artery lie and where supply?

Answer 9

lies in the infra temporal fossa

forms branches that supply structures in the ear, nose, mouth, pharynx and meninges

Question 10

where does the infratemporal fossa lie?

Answer 10

between the ramus of the mandible and the base of the skull

Question 11

what is the area that the foramen ovale opens into?

Answer 11

the infra temporal fossa

Question 12

how does the middle meningeal artery enter the skull?

Answer 12

it passes from the infratemporal fossa into the foramen spinousum to enter the skull

Question 13

what are the boundaries of the infratemporal fossa?

Answer 13

anterior - posterior surface of maxilla
posterior - styloid process
superior - infra temporal surface of the greater wing of sphenoid
media - lateral pterygoid plate
lateral - ramus of the mandible

Question 14

what are the contents of the infra temporal fossa (6 things)?

Answer 14

lateral and medial pterygoid

mandibular division the trigeminal nerve and its branches

maxillary artery and branches

pterygoid venous plexus

chords tympani

otic ganglion

Question 15

explain the course of the mandibular division of the trigeiminal nerve

Answer 15

the mandibular division passes through the foramen ovale and into the infra temporal fossa where it gives branches that supply the muscles of mastication and sensory nerve to the teeth and oral cavity

Question 16

what branch of the mandibular division of the trigeminal nerve supplies the lower teeth and skin over the mandible ?

Answer 16

the inferior alveolar branch

Question 17

what branch of the mandibular division of the trigeminal nerve supplies the skin anterior to the auricle?

Answer 17

the auriclotemporal nerve

Question 18

where does the maxillary artery arise from?

Answer 18

it is a branch of the external carotid artery

Question 19

where does the maxillary artery supply?

Answer 19

muscles of mastication
the dura
the lower teeth
the cheek

Question 20

describe the innervation of the upper teeth

Answer 20

the mandibular division of the trigeminal nerve passes between the heads of lateral pterygoid to send branches to the upper teeth

Question 21

what are the divisions of the maxillary artery that arise as it crosses the infra temporal fossa?

Answer 21

mandibular
pterygoid
pterygopalatine

Question 22

what is the pterygoid venous plexus?

Answer 22

a small connective network of veins surrounding the lateral pterygoid that is usually difficult to see

Question 23

where does the ptyerygoid venous plexus communicate w/?

Answer 23

w/ the cavernous venous sinus inside the skull and the facial vein that drains the superficial structures of the face

Question 24

where does the chorda tympania arise from and where does this occur?

Answer 24

arises from the facial nerve as it passes through the temporal bone

Question 25

explain the course of the chorda tympani

Answer 25

it crosses the handle of the malleus and ossicle in the ear and then passes through a bony canal to reach the infratemporal fossa where it joins the lingual nerve and parasympathetic fibres and special sense of taste fibres and ten runs w/ the lingual nerve into the oral cavity

Question 26

where does the otic ganglion lie?

Answer 26

at the mouth of the foramen ovale