Larynx Flashcards
Fibrous
Inelastic; fiber glass
Intervertebral disks
Elastic
More elastic fibers, more flexible, yellowish
Ears
Synarthrodial joints
Not very moveable
Ex:chin, skull
Not intended to move
Amphiarthrodial joint
Limited motion
Ex: vertebrae
Slightly moveable
Synovial joints
Freely moveable, most common joint
Plane or glide joint
Concave surface with concave surface (sliding)
Ginglymus
Hinge joint, large range of motion in 1 plane
Knee
Pivot
Small projection of one bone thru another for good range of motion
Axis and atlas
Condyloid
Oval surface, convexity to fit inside-no rotation
Jaw
Saddle
Greater range of motion similar to condyloid joint with more movement
Thumb
Ball and socket
Most freely moveable, in every plane including rotation
Shoulder, hips
Hyoid bone
Only free floating bone in body, unpaired “u” shapes
Epiglottis
Umpired, sits behind hyoid bone (elastic cartilage)
Thyroid cartilage
Unpaired, “Adams apple” midline (largest) hyaline cart. (Greater/ lesser horns)
Cricoid cartilage
Unpaired, midline, touches horns of thyroid cartilage. Sits on top of trachea
2 arytenoids
Sits on top of cricoid, makes saddle joint. Open- close vocal folds
2 corniculate
Sits on top of arytenoids (look like teeth)
2 cuneiform
Floating, contained in aryepiglottic folds
Cricothyroid joint
Pivot
Flat facets
Slightly concave/ complex
Slightly rotational - lengthens vocal folds
Cricoarytenoid joint
Saddle
Oval facets
Rocking gliding movement- limited by tendinitis encapsulation
Intrinsic membranes and ligaments
Affects movements of the cartilages
Elastic membrane that line all of the larynx
Membrane: connective tissue in the inside of the larynx
Extrinsic membranes
Wrapping the outside cartilages
Major gap fillers
Do not govern movement
Thickened in middle
Supra glottal
Above the glottis
Vestibule
Open space at top of larynx, near epiglottis down to cuneiform
Ventricle
Right under ventricular folds. Space between true/ false folds
Subglottal
Below the glottis- bottom border of cricoid
Anterior commissure
Where TVF attach at front of cartilages
Posterior commissure
Arched space in back
Glottis
Open space between TVF
Extrinsic muscles of the larynx
Elevate it depress the larynx (move or fix larynx )
Suprahyoid
Muscles above hyoid bone
Elevators
Digastricus
“2 bellies” anterior/ posterior. Belly moves hyoid bone up and slightly forward
Mylohyoid
Forms floor of mouth- wide origin, deep ,helps drop jaw
Stylohyoid
Long/slender. Run along posterior belly
Laterally
Pulls back and up
Geniohyoid
Arises medial of mandible- anterior body of hyoid bone
Hyaline Cartilage
Glassy, rigid, found at end of bones. Attach ribs to sternum calcify when older
