Adult Dysphagia Flashcards
Dysphagia
A swallowing disorder that may occur as a result of various medical conditions. Dysphagia is defined as problems involving the oral cavity, pharynx, esophagus, or gastroesophageal junction.
true presence and cause is not fully known.
1/3 who have dysphagia get pneumonia
Cranial nerves
A lot are used when eating and drinking
Muscles of orofacical structures
Same muscles utilized for speech as for swallowing
Different function from speech vs swallowing
Oral Phase
Orbicularis and oris muscles- labial closure
Incisivus labii muscles- pucker
innvervation CS VII
Function- grasping function, creation of labial seal.
Levator anguli oris, depressor labii oris, lavator labii superioris-depressor labii inferioris (smile), mentalis (frown)- these muscles make the lips part/retract/press upper and lower lips can move away and towards eachother. can be active singlularly or in combination
Oral phase (cheeks)
Buccinator(lateral wall of oral cavity) and Risorius muscle- together form check contraction.
-Temporary storage for mastication of bolus formation.
Innervation- motor innervation is from the buccal branch of the facial nerve VII. sensory innervation is from the buccal branch of the mandibular part of the trigeminal (CN V)
Tongue
Most important structure in oral phase
- function: hold and manipulate the bolus
- transport the bolus
- -initiate the pharyngeal swallow
muscular hydrostat- no skeleton
tongue blood supply from lingual artery that branches off of the external carotid artery.
-begins to develop in 4th week of human development
Tongue Intrinsic muscles
make up the body of the tongue
innervation- CN XII
change the shape of the tongue
superior longitudinal (tip up- creates the concave space for the bolus to rest (holds liquid)
Tongue extrinsic muscles
origionate outside the tongue and insert into the tongue.
function- elevate or depress the tongue, protrusion or retraction.
Hypoglossus- causes the tongue to depress and retract.
-Syloglossus- causes the back of the tongue to elevate and move posterior
-Palatoglossus- lowers the velum, elevates the back of the tongue. essential for bolus transfer.
Genioglossus- aids in multiple different movements of the tongue (below the tongue)
Taste
a form of chemoreception (thousands of taste buds in the oral cavity) heavily distributed on the tongue.
-thermoreceptors- aid in temperature sensation
Tongue conditions- Ankyloglossia
also known as tongue tie, is a congenital oral anomaly that may decrease mobility of the tongue tip and is caused by an unusually short, thick lingual frenulum, a membrane connecting the underside of the tongue to the floor of the mouth. can affect eating, speech, and oral hygiene.
Tongue conditions- Black hairy tongue
a condition in which small bumps on the tongue elongate with black or brown discoloration, giving a black and hairy appearance. The appearance may be alarming, but it is a harmless condition. Predisposing factors include smoking, xerostomia (dry mouth), soft diet, poor oral hygiene and certain medications.
muscles of the velum (soft palate)
levator veli palatine (velar elevation)
Tensor veli palatine (velar tension)
function- close off the velopharyngeal port. (mort complex for swallowing than it is for speech.
muscles of mandible
- Temporalis
- Lateral pterygoid
- Medial pterygoid
- Masseter
help the jaw move.
mandibular elevation
temporalis, masseter, medial pterygoid
Mandibular depression
Lateral pterygoid
Suprahyoid muscles
form the floor of the mouth, position the hyoid bone
Infrahyoid muscle function- depress the hyoid
Suprahyoid muscles
Mylohyoid- elevates and pulls forward the hyoid bone/depresses the mandible and opens the mouth
Digastric muscle- anterior belly- pull the mandible forward and bring down
posterior belly- draws back the hyoid bone.
Geniohyoid- pulls the hyoid bone forward and up, lateral movement of the mandible
Stylohyoid- elevate the hyoid during swallowing, pulls hyoid backwards to keep the mouth open.
Infrahyoid muscles
Sternohyoid- depress the hyoid
Thyrohyoid- depress the hyoid, elevate the larynx
Sternothyroid- depress the larynx (important for mastication/chewing as well as swallowing, pitch, volume.
Pharynx
3 section: Nasopharynx, Oropharynx, and Laryngopharynx
Parynx (outer layer) function is to constrict/narrow pharyngeal cavity (during swallowing, these muscles constrict to propel the bolus downwards.
Inferior pharyngeal constrictors are the strongest and have 2 main components (thyropharyngeus and cricopharyngeus)