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Flashcards in Anatomy Memorization Deck (111)
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1

Bones of Orbit

Frontal
Maxilla
Zygoma
Ethmoid
Sphenoid
Lacrimal
Palatine

2

Zygomatic Bone

Part of lateral wall and floor of orbit
Parts of temporal and infratemporal fossa
Articulates w/ maxilla (anteriorly), temporal bone (posteriorly) and frontal bone (superiorly)

3

Maxilla - Components, boundaries of, and fossae

Has body and four processes - zygomatic, frontal, alveolar and palatine

Boundaries of: roof of mouth (palate), floor and lateral wall of nose, floor of orbit

Two fossae: Infratemporal and pterygopalatine

4

Infratemporal Boundaries - Anterior, posterior, medial, lateral

Posterior maxilla

Temporal bone (articular tubercle) and spine of sphenoid

Lateral pterygoid plate (sphenoid)

Mandibular ramus

5

Infratemporal fossa Boundaries - Roof, floor

Greater wing of spehnoid (w/ foramen ovale)

Medial pterygoid muscle

6

Infratemporal Fossa Contents

Temporalis and pterygoid muscles

Maxillary artery and branches

Pterygoid plexus of veins

Mandibular nerve

Chorda Tympani

Otic ganglion (CN 9)

7

Pterygopalatine Fossa Boundaries - Anterior, posterior, medial, lateral, roof, floor

Maxilla

Pterygoid plates

Nasal Fossa

Infratemporal fossa

Greater wing of sphenoid (opens into IOF)

Pyramidal process of palatine bone

8

Pterygopalatine Fossa Contents

Pterygopalatine (3rd part) part of maxillary artery and branches

Maxillary Nerve

Nerve of pterygoid canal

Pterygopalatine ganglion and branches

9

Pterygopalatine Fossa - Lateral Communication

Passageway
Contents Passing
Space

Pterygomaxillary Fissure
Posterior Superior Alveolar NAV
Infratemporal fossa

10

Pterygopalatine Fossa - Anterosuperior Communication

Passageway
Contents Passing
Space

Inferior orbital fissure

CN V2

Orbit

11

Pterygopalatine Fossa - Posterosuperior Communication

Passageway
Contents Passing
Space

Foramen rotundum and pterygoid canal

CN V2; nerve of pterygoid canal (formed by deep and greater petrosal nerves)

Middle cranial fossa

12

Pterygopalatine Fossa - Medial Communication

Passageway
Contents Passing
Space

Sphenopalatine foramen

Sphenopalatine artery and vein, nasopalatine nerve

Nasal cavity

13

Pterygopalatine Fossa - Inferior Communication

Passageway
Contents Passing
Space

Palatine canals

Greater and lesser palatine NAVs

Oral cavity

14

Nasal Septum Bones

Vertical plate of ethmoid
Vomer
Nasal crest of maxilla and palatine bones
Nasal crest of sphenoid bone

Septal cartilage

15

Kisselbach's Plexus - 5 arteries anastomosis

Sphenopalatine artery (maxillary a)
Greater palatine artery (maxillary a)
Superior labial artery (facial a)
Anterior ethmoid artery (opthalmic a)
Lateral nasal branches from facial a

16

Nasolacrimal Apparatus Drainage

Inferior meatus

17

Frontal Sinuses Drainage

Hiatus semilunaris (middle meatus)

18

Maxillary sinuses Drainage

Middle meatus - ostium (within hiatus semilunaris)

19

Ethmoid sinuses Drainage

Anterior
Middle
Posterior

Hiatus semilunaris

Ethmoidal bullae

Superior meatus

20

Sphenoid sinus drainage

Sphenoethmoidal recess of nasal cavity

21

Epidural hematoma
Subdural hematoma
Subarachnoid hemorrhage

Middle meningeal artery

Bridging vein

Ruptured aneurysm (ex: anterior communicating a)

22

Falx Cerebri (vertical)

Vertical/midline

Seperates cerebral hemispheres

Forms superior/inferior sagittal sinuses

23

Falx cerebelli (vertical)

Separates cerebellar hemispheres

Contains occipital sinus

24

Tentorium Cerebelli (Horizontal)

Separates occipital lobe from cerebellum

Contains straight, transverse and superior petrosal sinuses

25

Diaphragma sella (Horizontal)

Roof of sella turicica

Small hole = passage for pituitary stalk

26

Cavernus Sinus Anterior

Connections
Contents
Description

Superior/inferior opthalmic veins, pterygoid plexus of veins.

Lateral wall: CN 3, 4, V1, V2

Route of infection to brain

27

Cavernus Sinus Posterior

Connections
Contents
Description

Superior/inferior petrosal sinus, intercavernous sinus

CN 6 and ICA (running through cavernous sinus)

Cavernus sinus thrombosis

28

Venticles - Nearby Anatomical Structures

Lateral Ventricle
Lateral Ventricle (Inferior Horn)
Third Venticle
Floor of fourth ventricle

Caudate nucleus

Hippocampus

Hypothalamaus

Pons

29

CSF Circulation Pathway

Lateral Ventricles -> Foramen of Monro -> Third ventricle -> Cerebral aqueduct -> Fourth ventricle -> Foramina of Magendie (Medial) and Luschka (Lateral) -> Bathes subarachnoid space -> Arachnoid granulations of superior sagittal sinus -> Venous circulation

30

Anterior 2/3rd of tongue Taste

Nerve
Pathway
Brain Stem nucleus
Thalamic Nucleus

CN 7 - Chorda tympani (travels via lingual nerve to geniculate ganglion)

Solitary Tract

Nucleus of solitary tract (gustatory nucleus)

VPM