Brs Head & Neck Chapter Summary 420-423

Front 1

Superior Sagittal Sinus - where is it?

Back 1

superior sagittal sinus lies in midline along convex border of falx cerebri

Front 2

Inferior Sagittal Sinus is joined by what vein? Where does it lie?

Back 2

is joined by the Great Cerebral Vein of Galen, lies in the free edge of the falx cerebri

Front 3

Which sinuses join at the cavernous sinus?

Back 3

superior sagittal, straight, occipital sinuses join at the confluence of sinuses

Front 4

What is the confluence of sinuses drained by?

Back 4

the transverse sinuses

Front 5

The transverse sinus drains into the...

Back 5

sigmoid sinus...which drains into the IJV

Front 6

What drains into the straight sinus?

Back 6

the inferior sagittal sinus & the great cerebral vein of Galen

Front 7

Where is the cavernous sinus located?

Back 7

on each side of the sella turcica of the sphenoid bone

Front 8

What does the cavernous sinus communicate with?

Back 8

opthalmic vein, pterygoid venous plexus, facial vein

Front 9

What is located inside the cavernous sinus?

Back 9

the ICA & the abducens nerve

Front 10

What lies in the lateral border of the cavernous sinus?

Back 10

OTOM:
oculomotor nerve,
trochlear nerve,
opthalmic nerve,
maxillary nerve

Front 11

What does the optic canal transmit?

Back 11

The optic nerve (CN II) and the opthalmic artery (a branch of the ICA)

Front 12

What does the SOF transmit?

Back 12

The oculomotor (CN III), trochlear (CN IV), Opthalmic (CN V1) and abducens (CN VI) nerves and the opthalmic vein

Front 13

What does the IOF transmit?

Back 13

The infraorbital nerve (branch of V2) and the infraorbital vessels (a branch of the pterygopalatine part of the Maxillary artery)

Front 14

What are the 6 mm of eye movement and what is their innervation?

Back 14

SO4 LR6 AO3
Superior Oblique = Trochlear (CN IV)
Lateral Rectus = Abducens (CN VI)
All Others (medial rectus, inferor oblique, inferior rectus, superior rectus, levator palpebrae) = Oculomotor (CN III)

Front 15

What are the branches of the opthalmic nerve (CN V1)?

Back 15

Lacrimal,
Frontal,
Nasociliary

Front 16

What does the frontal n divide into?

Back 16

the frontal nerve, a branch of V1, divides into supratrochlear and supraorbital branches

Front 17

What does the nasociliary nerve go to? What types of fibers does it carry?

Back 17

The nasociliary nerve gives off a communicating branch to the ciliary ganglion. It carries preganglionic parasympathetic fibers to the ciliary ganglion (which supplies the sphincter pupillae and ciliary mm)

Front 18

What is the "sympathetic" branch of the nasociliary nerve?

Back 18

The long ciliary branches carry sympathetic fibers to the dilator pupillae mm.

**In Horner's syndrome, the sympathetic ganglion is damaged and so you have miosis (constricted pupil) because dilator pupillae is not working**

Front 19

What is the opthalmic artery a branch of? What does it supply?

Back 19

It is a branch of the ICA.

It supplies the orbit and eyeball.

Front 20

What are the muscles of the palate? What are they innervated by?

Back 20

The palatoglossus, palatopharyngeus, muscular uvulae and levator veli palatine are innervated by VAGUS.

The tensor veli palatine is innvervated by the mandibular branch of trigeminal

Front 21

What nerves innervate the teeth? (the maxillary and mandibular teeth?)

Back 21

The maxillary teeth are innervated by the superior alveolar nerve, a branch of the maxillary division of trigeminal.

The mandibular teeth are innervated by the inferior alveolar branch of the mandibular division of the trigeminal nerve.

Front 22

What innervates the outer and inner surfaces of the maxilla?

Back 22

the OUTER surface = superior alveolar and infraorbital (off V2)

the INNER surface = greater palatine and nasopalatine nerves (off V2)

Front 23

What innervates the outer and inner surface of the mandibular gingiva?

Back 23

the OUTER surface = buccal and mental nerves (off V3)

the INNER surface = lingual nerve (off V3)

Front 24

What innervate the "glossal" (tongue) muscles?

Back 24

All innervated by HYPOGLOSSAL;

except PALATOGLOSSUS = VAGUS

Front 25

What supplies taste to the anterior 2/3 of the tongue?

Back 25

Chorda tympani from facial n.

Front 26

What nerve provides general sensation to the anterior 2/3 of the tongue?

Back 26

the lingual nerve (a branch of V3)

Front 27

What nerve provides taste and general sensation to the posterior 1/3 of the tongue?

Back 27

GLOSSOPHARYNGEAL n.

Front 28

What is the submandibular duct also called? Where does it open?

Back 28

AKA Wharton's duct; it passes medial to the lingual nerve and opens onto sublingual caruncle

Front 29

Where does the sublingual gland open?

Back 29

on the sublingual fold or into the submandibular duct

Front 30

From where do the submandibular and sublingual glands receive their fibers? What kind of fibers are they?

Back 30

they receive postganglionic parasympathetic fibers from the submandibular ganglion

Front 31

the lingual artery is a branch of what artery? it passes posterior to what muscle?

Back 31

arises from ECA; passes posterior to hyoglossus m

Front 32

The lingual and hypoglossal nerves pass anterior to which m?

Back 32

hyoglossus m.

Front 33

What are the branches of the lingual artery?

Back 33

dorsal lingual, deep lingual, sublingual

Front 34

What are the 3 divisions of the nasal cavity?

Back 34

vestible
olfactory region (upper 1/3)
respiratory region (lower 2/3)

Front 35

What provides GSA innervation to the nose?

Back 35

branches of opthalmic (V1) and maxillary (V2) nerves

Front 36

What nerve provides SVA (smell) to nose?

Back 36

Olfactory nerve (CN I)

Front 37

What arteries supply blood to the nasal cavity?

Back 37

sphenopalatine branch of maxillary a,
anterior ethmoidal branch of opthalmic,
septal branch of facial a

Front 38

What nerve provide preganglionic parasympathetic fibers to the pterygopalatine ganglion?

Back 38

the greater petrosal (of facial) and deep petrosal nerves combine to form the n. of the pterygoid canal

Front 39

Fibers from the pterygopalatine ganglion travel to what gland through what nerves?

Back 39

Travel to LACRIMAL GLAND via zygomatic branch of the maxillary nerve and the lacrimal branch of the opthalmic nerve

Front 40

What kinds of fibers does the greater petrosal nerve contain?

Back 40

parasympathetic preganglionic GVE to pt ganglion;
GVA & SVA (taste) to palate

Front 41

Where does the deep petrosal nerve come from? what kinds of fibers does it contain?

Back 41

The deep petrosal nerve comes from the ICA PLEXUS;
it contains postganglionic sympathetic fibers

Front 42

What kinds of fibers does the n of the pterygoid canal contain?

Back 42

Greater petrosal + deep petrosal combined =
pregang para (GVE), GVA, SVA, post gang sympathetic (GVE)

Front 43

layngeal mm are innervated by what nerve?

Back 43

They are all innervvated by the recurrent layngeal branch of the vagus nerve except for the CRICOTHYROID which is innervated by the EXTERNAL LARYNGEAL branch of the superior layngeal nerve of the vagus

Front 44

Which laryngeal m ABDUCTS the vocal cords?

Back 44

posterior cricoarytenoid

Front 45

What is the CHIEF ADDUCTOR of the vocal cords?

Back 45

The lateral cricoarytenoid

Front 46

What is the chief tensor of the vocal cords? What innervates it?

Back 46

Cricothyroid; external laryngeal of superior laryngeal of vagus

Front 47

What nerve supplies general sensation and taste above the vocal cords? What artery runs with it?

Back 47

the internal laryngeal nerve;
superior laryngeal artery

Front 48

What nerve supplies sensation below the vocal cord?

Back 48

recurrent laryngeal nerve

Front 49

What arteries supply blood to the larynx?

Back 49

the superior laryngeal artery (off superior thyroid), the inferior laryngeal artery of the inferior thyroid artery

Front 50

What nerves innervate the external ear?

Back 50

the great auricular (cervical plexus), auriculotemporal (branch of V3), lesser occipital nerves (cervical plexus)

Front 51

What innervates the EAM (external acoustic meatus)?

Back 51

the auriculotemporal branch of V3, the auricular branches of facial, vagus and glossopharyngeal

Front 52

What innervates the external surfaces of the tympanic membrane?

Back 52

trigeminal, facial, glossopharyngeal & vagus

Front 53

what innervates the internal surface of the tympanic membrane?

Back 53

the glossopharyngeal nerve

Front 54

What three bones form the auditory ossicles?

Back 54

the incus, malleus & stapedius

Front 55

What innervates the tendon of the tensor tympani mm?

Back 55

the mandibular division of trigeminal

Front 56

What innervates the stapedius m?

Back 56

nerve to stapedius of facial

Front 57

What nerve branch passes between the malleus and incus, exits through the petrotympanic fissure and joins the lingual nerve in the infatemporal fossa?

Back 57

chorda tympani

Front 58

What types of fibers does the chorda tympani convey?

Back 58

preganglionic parasympathetic fibers to the submandibular gland;
taste fibers from anterior 2/3 of tongue

Front 59

Infrahyoid mm are innvervated by what?

Back 59

Ansa cervicalis EXCEPT thyrohyoid which is innervated by C1 via hypoglossal n.

Front 60

Muscles of facial expression innervated by?

Back 60

FACIAL n

Front 61

mm of mastication innervation?

Back 61

trigeminal (mandibular division)

Front 62

palate muscles innervation?

Back 62

vagus except tensor veli palatini = trigeminal (mandibular div)

Front 63

pharyngeal mm innervation?

Back 63

vagus EXCEPT stylopharyngeus = glossopharyngeal

Front 64

laryngeal mm innervation?

Back 64

recurrent laryngeal nerve except cricothyroid = external laryngeal nerve of superior laryngeal nerve of vagus

Front 65

suprahyoid mm?

Back 65

stylohyoid, myohyoid, digastric, geniohyoid

Front 66

innervation of suprahyoid mm?

Back 66

stylogyoid & posterior digastric = facial n;
mylohyoid & anterior digastric = trigeminal n.
geniohyoid = C1 via hypoglossal

Front 67

innervation of trap & SCM?

Back 67

spinal accessory = XI

Front 68

what is sympathetic effect on pupil?

Back 68

dilates it

Front 69

parasympathetic effect on pupil?

Back 69

SPHINCTER = constricts it