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LARYNX REVIEW: LOCATION
LARYNGEALPROMINENCE OF THYROID CARTILAGE =ADAM'SAPPLE - LEVELC4
HYOID BONE
TRACHEA
THRYOID GLAND
Larynx Functions- produces sound- regulates opening to trachea, respiratory system
STERNOCLEIDO-MASTOID MUSCLE
CLINICAL - OBSTRUCTION OF LARYNX CAN PRODUCE SUFFOCATION
LARYNX: IMAGINGCADAVER SECTION CT SECTION
LARYNX
PHARYNX +ESOPHAGUS
LARYNX
COMMONCAROTID A.,IJV
BODIESOF CERVICALVERTEBRAE
CLINICAL: PALPATE CAROTID BIFURCATION LATERAL TO LARYNGEAL PROMINENCE- NERVES TO LARYNX CAN BE DAMAGED DURING CERVICAL DISC REPAIR
LARYNX REVIEW: CARTILAGES
THYROID CARTILAGE - shield shaped - has Sup. and Inf. Horns- Laryngeal prominence
CRICOID = signet ring - complete ring of cartilage- narrow Arch ant., broad Lamina post.
ARYTENOID - 2 pyramidal shaped cartilages above lamina of cricoid
Sup. Horn
Laryngeal prominence= Adam'sapple
Inf. Horn
Arytenoid
Cricoid
lamina
CorniculateCartilages
HINGEJOINT
JOINTS PERMIT ROTATION AND SLIDING: - OPEN OR CLOSE LARYNX (ABDUCT OR ADDUCT VOCAL LIGAMENTS)
SYNOVIALJOINT BETWEEN ARYTENOID AND CRICOID
LARYNX REVIEW: SYNOVIAL JOINTS
THYROID and CRICOID ARYTENOID and CRICOID
JOINTS PERMIT TILTING OF THYROID-CRICOID:- CHANGE PITCH OF SOUND (TENSE OR RELAX VOCALLIGAMENTS)
CLINICAL - MUCOSA SWELLS IN ANAPHYLAXIS; OBSTRUCTION CAN RESULT FROM SWELLING AT VESTIBULAR (FALSE VOCAL FOLDS)
1) Superior Laryngeal N.a) Internal Laryngeal N.Visceral Sensory (GVA) to LarynxAbove (true vocal folds)b) External Laryngeal N.Branchial motor (SVE) to
Cricothyroid
2) Recurrent Laryngeal n.- Visceral Sensory (GVA) to Larynx Below True Vocal Folds- Branchial motor (SVE) to all other Muscles of Larynx
SUP. LARYNG. N.
RECURRENTLARYNG. N.
Int. Laryng. N.
Ext. Laryng. N.
NERVES OF LARYNX – Branches of Vagus
Clinical - damage to RecurrentLaryngeal nerve in Thyroid surgery
CLINICAL - IN OBSTRUCTION OF LARYNX, EMERGENCY OPENING MADE IN CRICOTHYROID MEMBRANE (CRICOTHYROTOMY); AVOIDS BLLEDING THAT CAN OCCUR IN TRACHEOTOMY (FROM INFERIOR THYROID VEINS)