H&N booklet 2 Flashcards
What are the muscles of mastication?
Temporalis
Masseter
Medial Pterygoid
Lateral Pterygoid
What are the bony attachments of the temporalis muscle?
Temporal fossa
Coronoid process of mandible
What action do the anterior fibres have on the mandible?
Protraction
What action do the posterior fibres have on the mandible?
Elevation + retraction
What are the bony attachments of the masseter?
Zygomatic arch
Outer surface of the ramus and coronoid process of mandible
What is the action of the masseter?
Primary muscle of jaw closure (elevation)
Where do the pterygoid muscles attach?
Lateral pterygoid plate
>Medial is on medial surface
>Lateral on lateral surface
Where does the lateral pterygoid muscle attach to?
TMJ
Lateral surface of the lateral pterygoid plate
Where does the medial pterygoid muscle attach to?
Angle of mandible
Medial surface of lateral pterygoid plate
What are the actions of the pterygoid muscles?
1) Lateral together
2) medial together
3) One medial and one lateral (on same side)
1) Protraction of mandible
2) elevation of mandible
3) Contralateral contraction
What muscles cause depression of the mandible?
Surpahyoid muscles >Digastric >Mylohyoid >Stylohyoid Gravity
What muscles cause elevation of the mandible?
Masseter
Temproalis - anterior fibres
Medial pterygoids together
What causes protrusion of the mandible?
Lateral pterygoids
What causes retration of the pterygoids?
Temporalis - posterior fibres
what causes side to side movements of the mandible?
Medial pterygoids
What nerve innervated the muscles of mastication?
Trigeminal nerve - mandibular division: CN V3
What are the functions of the nose?
Traps dirt
Warms air
Sinus/eye secretion
Olfaction
Which bones do the nasal bones articulate with?
Frontal bone - superior
Maxilla - frontal process - laterally
Ethmoid - posterior
What bones make up the roof of he nose?
Nasal
Frontal bone
Ethmoid bone
Body of spheniod bone
What makes up the floor of the nasal cavity?
Palatine processes of maxilla
Palatine bones
>Form hard palate
Extended posteriorly by sft palate
What bones make up the nasal septum?
Vomer
Perpindicular plate of the ethmoid bone
How can nasal deviation affect a patient?
Might be unable to drain paranasal air sinuses effectively
May lose smell
What are the parts of the ethmoid bone?
Cribriform plate Crista gali Central plate Superior + middle conchae Ethmoid air cells
What passes through the cribriform plate?
Olfactory nerve
What attaches to the crista gali?
Olfactory bulbs
Falx cerebri
What type of epithelium forms the respiratory mucosa of the nasal cavity?
Ciliated pseudostratified columnar
Olfactory mucosa for roof
What is the name of the space above the superior conchae?
sphenoethmoidal recess
What are the spaces beneath the conchae called?
Meatuses
What is the other name for a conchae?
Turbinate - when lined with epithelium
What bones do the conchae arise from?
Inferior is its own bone
Middle + superior from ethmoid bone
What are the paranasal air sinuses?
Air filled extensions of the respiratory tract
What are the functions of the paranasal air sinuses?
Regulation of gas pressure
Increased resonance of voice
Decreased relative weight of skull
What draines into the sphenoethmoid recess?
Sphenoid sinus
What drains into the superior meatus?
Posterior ethmoid air cells
What drains into the middle meatus?
Maxillary sinus
Frontal sinus
Superior ethmoid air cells
Anterior ethmoid air cells
What drains into the inferior meatus?
Nasal lacrimal duct
Which sinus has its draining above its most inferior part?
Maxillary
What branches of the trigeminal nerve innervate the air sinuses?
CN V1 >Frontal >Sphenoid >Ethmoidal CN V2 >Maxillary >Sphenoid
What is the vestible?
The space between the teeth and cheeks
What muscle causes closing of the lips?
Orbivular oris
What are the functions of the tongue?
Moving food during swallowing
Taste
Speech
What sulcus divides the tongue?
Sulcus terminalis
What is the embryological significance of the foramen caecum?
Site of the thyroid development
>Can lead to thyroglossal cyst
What are the three types of papillae?
Filiform - only one without taste buds
Fungiform
Vallate
What are the lymphoid elevations of the posterior tongue called?
Lingular tonsils
What fold of mucous membrane fixes the tongue to the floor of the mouth?
Frenulum
What nerve innervates the general sensation of the anterior 2/3 of the tongue?
Trigeminal nerve - mandibular branch - CNV3
What nerve innervates the general sensation of the posterior 1/3 of the tongue?
Glossopharyngeal nerve - CN IX
What nerve innervates the taste sensation of the anterior 2/3 of the tongue?
Facial nerve - CNVII
Chorda tympani branch
What nerve innervates the taste sensation of the posterior 1/3 of the tongue?
Glossopharyngeal nerve - CN IX
What are the types of muscle fo the tongue?
Intrinisc
Extrinisc
What are the functions of the toungue muscle types?
Intrinisc - shape tongue
Extrinisic - move tongue
What are the extrinsic muscles of the tongue?
Genioglossus
Hyoglossus
Styloglossus
Palatoglossus
What is the attachment of the genioglossus?
Inerior surface of the mandible
What is the attachment of the hyglossus?
Upper border of mandible
What is the attachment of the styloglossus?
Styloid process
What is the attachment of the palatoglossus?
Soft palate
What is the action of the genioglossus?
Protrudes tongue to other side
What is the action of the hyglossus?
Depresses and retracts tongue
What is the action of the styloglossus?
Retracts tongue
Elevates tongue
What is the action of the palatoglossus?
Elevates posterior tongue
Depresses soft palate
What nerve innervates the muscles of the tongue?
Hypoglossal nerve
Except for palatoglossus
What are the three pairs of salivary gland?
Parotid
Submandibular
Sublingual
What nerve gives parasympathetic innervation to the salivary glands?
Parotid - glossopharyngeal
Submandibular + sublingual - facial nerve
What muscles make up the soft palate?
Palatoglossus Tensor veli palatine Levator veli palatin Palatopharyngeus Muscularis uvulae
What nerve innervates the muscles of the soft palate?
Vagus nerve
What is the collective action of the soft palate muscles?
Swallowing
Breathing
What structure lies between the palatoglossus and the palatopharyngeus muscles?
Palatine tonsils
>Lymphatic structure
What are the three parts of the pharynx?
Nasopharynx
Oropharynx
Laryngopharynx
What makes up the roof of the nasopharynx?
Sphenoid bone
What stops a bolus from:
1) entering the naso pharynx
2) entering the larynx?
1) soft palate
2) epiglottis
What are the three layers of the pharynx?
Outer muscular layer
Middle fibrous layer
Inner mucous membrane
What muscles make up the outer circular layer of the muscular layer of the pharynx?
Constrictor muscles
Superior, middle and inferior
What muscles make up the inner longitudinal layer of the muscular layer of the pharynx?
Stylopharyngeus
Salpingopharyngeus
Palatopharangeus
Where does the pharynx gets its innervation from?
Pharyngeus plexus
>Sensory - IX
>Motor - X
What is the action of the constrictor muscles of the pharynx during swallowing?
Pushes food into oesophagus
What is the action of the longitudinal layer of muscles of the pharynx during swallowing?
Propells bolus down
What is the role of the tongue and palate during swallowing?
Pusehs food into pharynx and stops going into the nasal pharynx
What are the parts of the lumen of the larynx?
Vestible (upper part, between false cords and laryngeal inlet)
Middle - between false and true cords
Lower part - from vocal cords to cricoid cartilage
What nerves innervate the intrinisc muscles of the larynx?
Recurrent laryngeal nerve
>Except cricothyroid which is superior laryngeal nerve
What nerve innervates the mucous membrane of the larynx?
Superior laryngeal nerve