Pharynx Flashcards
Extent of Pharynx
From the Base of Skull to the Upper border of Cricoid Cartilage
Length 12-14 cm
Diameter 3-4 cm
Diameter of Pharynx at Pharyngoesophageal Junction
1.5 cm
3 Subdivisions of Pharynx
Naso-pharynx ~ behind nasal cavity
Oro-pharynx ~ behind oral cavity
Hypo-pharynx ~ behind Larynx
Anterior wall of Nasopharynx is
Deficient
And it is made up of Posterior Nasal Aperture ~ Nasal Choana
Sphenoid Bone
Occipital Bone
C1 Vertebra
Forms which part of Nasopharynx
Roof / Posterior Wall
Floor of Nasopharynx is made up of
Soft Palate and Pharyngeal Isthmus
The gap between Soft Palate and Posterior Pharyngeal Wall is
Pharyngeal Isthmus
Passavant’s Ridge is formed by
Upper Fibres of Palatopharyngeus Muscle Sweep backward horizontally
and
fuse with Upper Fibres of Superior Constictor
Forms U Shaped Loop in the Posterior Pharyngeal Wall
Passavant’s Ridge is formed by (single best answer)
Palatopharyngeus > Superior Constrictor
During swallowing Pharyngeal isthmus is closed by
Elevation of Soft Palate + Forward Pulling of Passavant’s Ridge
Lymphocytic Aggregation in the Roof / Posterior wall of Nasopharynx is
Adenoids / Nasopharyngeal Tonsils
Mucus Diverticulum extending into Adenoid
Is Nasopharyngeal Bursa
One small dimple above the nasopharyngeal bursa is
Remnant of Rathke’s Pouch
Following structures found in which part of Nasopharynx;
Adenoids
Nasopharyngeal Bursa
Rathke’s Pouch
Roof / Posterior Wall of Nasopharynx
Pharyngeal opening of Auditory Tube is situated at
1.25 cm behind the Inferior Turbinate
In lateral wall Nasopharynx
Above and Behind to Nasopharyngeal opening of Auditory Tube, the elevation is called
Tubal Elevation
From the Tubal Elevation, 2 extension/folds are
Salpingopalatine Fold ~ from auditory tube to the palate
Salpingopharyngeal Fold ~ from auditory tube to the pharynx
Fossa of Rossen Muller / Pharyngeal Recess seen ___________ Tubal Elevation
Behind the Tubal Elevation- seen pharyngeal recess tht is called Fossa of Rossen Muller
Which wall of Oropharynx is deficient / communicates with oral cavity
Anterior Wall
Posterior wall of Oropharynx is made up of
Opposite to C2 and Upper C3 vertebrae
Roof of Oropharynx is made up of
Soft Palate
Posterior 1/3rd of Tongue found in which part of Oropharynx I
Floor of Oropharynx
Lateral wall of Oropharynx has
Tonsillar Fossa
Boundaries of Tonsillar Fossa
Anterior Pillar ~ Palatoglossal Arch
Posterior Pillar ~ Palatopharyngeal Arch
Above ~ Soft Palate
Below ~ Post. 1/3rd of Tongue
Crypts are present on __________ Surface of Tonsil
Medial Surface
__________________ Space Surrounding the Capsule of Tonsil
PeriTonsillar Space
Has PeraTonsillar Vein
Infection in PeriTonsillar Space leads to
Quinsy
Pharyngobasillar Fascia
Superior Constrictor
Buccopharyngeal Fascia
From deep to Superficial
Seen in __________ wall of Tonsil
Lateral Wall Of Tonsil
Others Structures seen in the lateral wall of tonsil;
Facial Artery
Glossopharyngeal Nerve
Styloglossus Muscle
Blood Supply to Tonsil
- Lingual Artery
- Facial Artery
- Ascending Pharyngeal Artery
- Ascending Palatine Artery
- Maxillary Artery
Principal artery of Tonsil is
Facial Artery
The node for Palatine Tonsil
JuguloDigastric Node
Extension of Laryngopharynx
From Upper Border of Epiglottis to Lower Border of Cricoid Cartilage
Boundaries of Pyriform Fossa / Fishbone Area
Medially ~
Laterally ~
Medially ~ Aryepiglottic Fold
Laterally ~ mucous covering over the lamina of thyroid
Nerve supply to Pyriform Fossa / Fishbone Area
Internal Laryngeal Nerve
Inferior constrictor of Pharynx consists of
Thyropharyngeus Part
Cricopharyngeus Part
Inner surface of constrictor muscles is covered by
Pharyngo Basillar Fascia ~ it is thickening of submucosa
Buccopharyngeal Fascia covers ___________ Surface of Constrictor Muscles
External Surface
Bucco-pharyngeal Fascia covera Buccinator and Constrictor Muscles
The Potential Gap Between Thyropharyngeus and Cricopharyngeus Muscle is called
Killian’s area/dehiscence
Zenker’s Diverticulum arise from
Arising in the Killian’s Dehiscence
Due to the Muscular incoordination between the Thyrophayngeus and Cricopharyngeus muscles
Sinus of Morgagni transmit
- Auditory Tube
- Levator Palatini Muscle
- Ascending Palatine Artery
- Palatine Branch of Ascending Pharyngeal Artery
Its Gap/Space between Base of the Skull and Superior Constrictor
- Stylohyoid Ligament
- Glossopharyngeal Nerve
- Stylopharyngeus Muscle
Transmit through which gap of constrictor muscles
Gap between Superior and Middle Constrictor Muscles
Gap between Middle Constrictor and Inferior Constrictor Transmit
Internal Laryngeal Nerve and Superior Laryngeal Vessels
Below Inferior Constrictor the Structures Transmitting
Recurrent Laryngeal Nerve and Inferior Laryngeal Vessels
Longitudinal muscles of Pharynx
Salpingopharyngeus
Palatopharyngeus
Stylopharyngeus
Pharyngeal Plexus Supply
Sensory and Motor Supply to;
Palate
Pharynx
Except, Stylopharyngeus Muscle ~ IX Nerve
Pharyngeal Plexus is formed by
Pharyngeal branch of IX nerve
Pharyngeal branch of X nerve
Superior Cervical Ganglion
{pharyngeal part of accessory nerve is not giving contribution to Pharyngeal Plexus}
