6: Introduction to head and neck

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6: Introduction to head and neck by Mind Map: 6: Introduction to head and neck

1. Pharynx

1.1. nasopharyx

1.1.1. has opening of auditory tube and adenoid

1.2. oropharynx

1.2.1. has the palatine tonsils

1.3. laryngopharynx

1.3.1. has the piriform fossa

2. Larynx

2.1. paired cartilages

2.1.1. arytenoid

2.1.2. corniculate

2.1.3. cuneiform

2.2. unpaired cartilages

2.2.1. thyroid

2.2.2. cridoid

2.2.3. epiglottis

2.3. cavity of the larynx

2.3.1. from inlet to lower part of cricoid

2.3.2. 3 parts

2.3.2.1. vestibule of the larynx

2.3.2.2. middle part of the larynx

2.3.2.2.1. from vestibular folds to the vocal folds

2.3.2.3. lower part of the larynx

3. scalp

3.1. hairy soft tissue covering the cranial vault

3.2. from supraorbital margin to external occipital protuberance & superior nuchal line posteriorly

3.3. on each side extends to superior temporal line

3.4. 5 layers (SCALP

3.4.1. Skin

3.4.2. Connective tissue (superficial facia)

3.4.3. Aponeurosis (galea aponeurotica)

3.4.4. Loose areolar CT

3.4.5. Pericranium

4. Face

4.1. boundaries

4.1.1. superiorly: the hair line

4.1.2. inferiorly: chin and base of mandible

4.1.3. on each side: auricle

4.2. remember

4.2.1. forehead is common to scalp & face

4.2.2. shape is determined by underlying bones

4.2.3. No deep facia in the face

5. Oral cavity

5.1. 2 parts

5.1.1. oral cavity proper

5.1.2. vestibule

5.2. contents

5.2.1. alveolar processes and teeth

5.2.2. anterior 2/3 of the tongue

5.2.3. orifice of parotid gland in buccul mucosa (opposite to upper second molar)

5.2.4. orifice of submandibular dict

5.2.5. orifice of sublingual glands in anterior floor of the mouth

6. The nasal cavity

6.1. nasal septum divides it into right and left

6.1.1. floor

6.1.1.1. palatine process of maxilla

6.1.1.2. horizontal plate of palatine bone

6.1.2. roof

6.1.2.1. body of sphenoid

6.1.2.2. cribriform of ethmoid

6.1.2.3. nasal bone

6.1.2.4. nasal cartilages

6.1.3. medial wall = nasal septum

6.1.3.1. osteocartilaginous partition

6.1.3.2. covered by mucus membrane

6.1.3.3. formed by:

6.1.3.3.1. vertical plate of ethmoid bine

6.1.3.3.2. vomer

6.1.3.3.3. nasal crest of palatine bone

6.1.3.3.4. septal cartilage

6.1.4. lateral wall

6.1.4.1. superior, middle, inferior nasal conchae

6.1.4.2. area below each conchae is a meatus

6.1.4.3. openings

6.1.4.3.1. maxillary sinus (middle meatus)

6.1.4.3.2. frontal sinus (middle meatus via infundibulum)

6.1.4.3.3. sphenoid sinus

6.1.4.3.4. ethmoidal sinuses

6.1.4.3.5. nasolacrimal duct

7. Orbits

7.1. Eyelids

7.2. lacrimal apparatus

7.3. The extraocular muscles

7.3.1. Innervation

7.3.1.1. oculomotor nerve

7.3.1.2. abducent nerve

7.3.1.3. trochlear nerve

7.3.2. two obliques

7.3.2.1. superior

7.3.2.1.1. origine: posterior wall of the orbital cavity

7.3.2.1.2. insertion: superior wall of the eyeball

7.3.2.2. inferior

7.3.2.2.1. origine: floor of the orbit

7.3.2.2.2. insertion: lateral wall of the eyeball

7.3.3. four recti

7.3.3.1. origine: tendinous ring on the posterior wall of the orbital cavity

7.3.3.2. rectus superior

7.3.3.3. rectus inferior

7.3.3.4. rectus medial

7.3.3.5. rectus lateral

7.3.3.6. insertion: superior, inferior, lateral, medial walls of the eyeball respectively

7.4. orbital facia

7.5. conjunctiva

7.6. orbital fat

8. Triangles of the neck

8.1. divided by sternocledomastoid

8.2. anterior triangle

8.3. posterior triangle

9. blood supply

9.1. common carotid artery

9.1.1. internal carotid

9.1.2. external carotid

9.1.2.1. superior thyroid

9.1.2.2. ascending pharyngeal

9.1.2.3. lingual

9.1.2.4. facial

9.1.2.5. occipital

9.1.2.6. posterior auricular

9.1.2.7. superficial temporal

9.1.2.8. maxillary

9.2. veins

9.2.1. anterior jugular

9.2.2. external jugular

9.2.2.1. posterior auricular

9.2.2.2. superficial temporal

9.2.2.3. maxillary

9.2.2.4. retromendibular

9.2.2.5. posterior external jugular

9.2.2.6. transverse cervical

9.2.3. internal jugular

9.2.3.1. lingual

9.2.3.2. facial

9.2.3.3. superior thyroid

9.2.3.4. pharyngeal

9.2.4. New node

10. Innervation

10.1. cranial nerves mainly

10.2. sympathetic trunk (vasomotor mainly)

10.3. cervical plexus (C1-C4)

11. The ear

11.1. external ear

11.1.1. auricle

11.1.1.1. helix

11.1.1.2. lobule

11.1.1.3. concha

11.1.1.4. tragus

11.1.2. external auditory meatus

11.1.2.1. outer third id cartilaginous

11.1.2.2. medial two thirds are boney

11.1.2.3. has hair, sebaceous, and ceruminous glands

11.1.3. innervated by auriculotemporal and vagus nerves

11.2. middle ear (tympanic cavity)

11.2.1. Roof

11.2.1.1. tegmen typnai (tegmental wall)

11.2.2. floor

11.2.2.1. jugular floor

11.2.3. lateral

11.2.3.1. membranous wall

11.2.4. medial

11.2.4.1. labyrinthine

11.2.5. anterior

11.2.5.1. carotid wall

11.2.6. auditory tube leads to nasopharynx

11.2.7. Auditory ossicles

11.2.8. muscles of the ear

11.3. inner ear

11.3.1. bony labyrinth

11.3.1.1. vestibule

11.3.1.2. semicircular canals

11.3.1.3. cochlea

11.3.2. membranous labyrinth

11.3.2.1. utricle

11.3.2.2. saccule

11.3.2.3. semicircular ducts

11.3.2.4. ducts of cochlea

12. Head and neck skeleton

12.1. skull (28)

12.1.1. cranial (8)

12.1.1.1. 1 frontal

12.1.1.2. 2 parietal

12.1.1.3. 1 occipital

12.1.1.4. 2 temporal

12.1.1.4.1. petrous portion

12.1.1.5. 1 sphenoid

12.1.1.6. 1 ethmoid

12.1.2. facial (14)

12.1.2.1. 2 zygomatic

12.1.2.2. 2 maxillae

12.1.2.3. 2 nasal

12.1.2.4. 2 lacrimal

12.1.2.5. 1 vomer

12.1.2.6. 2 palatine

12.1.2.7. 2 inferior conchae

12.1.2.8. 1 mandible

12.2. cervical vertebrae (7)

12.2.1. transverse foramen

12.2.2. atypical c1 (atlas), c2 (axis), and c7

12.2.2.1. Atlas C1

12.2.2.1.1. ring of bone

12.2.2.1.2. lacking a spinous process or body

12.2.2.1.3. has superior facets for occipital condyles

12.2.2.2. Axis C2

12.2.2.2.1. has "Dens" or "odontoid process"

12.2.2.2.2. has bifid spinous process

12.2.2.2.3. pivotal movement at atlanto-axial joint (No, rotation)

12.2.2.3. C7 (vertebra prominens)

12.2.2.3.1. has long (not bifid) spinous process

12.2.2.3.2. small transverse foramen for vein only

12.2.3. typical c3,c4,c5,c6

12.2.3.1. small rectangular bodies

12.2.3.2. large and triangular vertebral foramen

12.2.3.3. short transverse processes with foramen

12.2.3.4. short and bifid spinous process

12.2.3.5. superior and inferior articular facet

12.3. Hyoid bone

12.3.1. slender, curved bone

12.3.2. located inferior to the skull (between mandible and larynx)

12.3.3. dose not articulate with any other bone

12.3.4. suspended by stylohyiod ligaments

12.3.5. consists of

12.3.5.1. body

12.3.5.2. greater horns

12.3.5.3. lesser horns

12.3.6. it's the base for attachment of muscles and ligaments of the tongue and larynx