home
about the project
Medical news
For authors
Licensed books on medicine
<< Previous Next >>

CLINICAL THROAT ANATOMY

The pharynx, pharynx, is the initial part of the digestive tube located between the oral cavity and the esophagus. At the same time, it is also part of the respiratory tube, connecting the nasal cavity or oral cavity with the larynx. Consequently, in the pharyngeal cavity, the digestive and respiratory tract cross. The pharynx has the shape of a funnel-shaped tube flattened in the anteroposterior direction, suspended from the base of the skull. The line of attachment to the base of the skull passes through the following formations: behind - the pharyngeal tubercle of the basilar part of the occipital bone, on the sides - the temporal bone pyramids (anterior to the external opening of the carotid canal), then the medial plate of the pterygoid process of the sphenoid bone. At the level of 6-7 cervical vertebrae, the pharynx passes into the esophagus. The length of the pharynx in an adult is 12-14 cm. The pharynx is located anterior to the cervical spine.

Three parts are distinguished in the pharynx: the upper part is the nasal part, or nasopharynx, pars nasalis is the epipharynx, the middle part is the oral part is the oropharynx, pars oralis is the mesopharynx, and the lower part is the larynx or the larynx, pars laringea is the hypopharynx (Fig. 3.1).

In the pharynx, there are: upper, back, two side and front walls. The upper wall is fused to the outer base of the skull in the region of the basilar part of the occipital bone and the sphenoid bone body.

The side walls are adjacent to the neurovascular bundles of the neck. The front wall is almost absent, since in its upper and middle parts of the pharynx it communicates with neighboring cavities through the choanas, pharynx, and the entrance to the larynx. The anterior wall is present only in the lower part (larynx). It is formed by the arytenoid and cricoid cartilages, covered with muscles.

The nasopharynx communicates via the choan with the nasal cavity and performs exclusively respiratory functions. The upper wall of the nasopharynx, or arch of the pharynx, borders the sphenoid and part of the occipital bone, the back wall with 1 and 2 cervical vertebrae. In the posterior region of the upper wall and the upper part of the posterior wall, there are accumulations of lymphoid tissue that forms the pharyngeal, or third tonsil, tonsilla pharyngea. At the pharyngeal opening of the auditory tube there is an accumulation of lymphoid tissue called the tubal tonsil, tonsilla tubaria. The oropharynx is conditionally separated from the nasopharynx by a plane, as if continuing a soft palate. From the front, through the pharynx, it communicates with the oral cavity. The pharynx, fauces, is limited from above by the soft palate, from below - by the root of the tongue and from the sides - palatine-lingual and sky-pharyngeal arches, arcus palatoglossus, arcus palatopharyngeus. The soft palate, palatum molle, is a continuation of the hard palate, which is a very mobile muscle plate covered with mucous membrane, which in a calm state hangs down to the base of the tongue and is called the palatine curtain, velum palatinum. Elongated in the form of a process along the midline, the free end of the soft palate is called the uvula. During the passage of food and when pronouncing some sounds, the palatine curtain adheres tightly to the posterior pharyngeal wall, separating the nasopharynx from the oropharynx.

Palatine-lingual (anterior) and palatopharyngeal (posterior) temples descends from the lateral divisions of the palatine curtain. In the triangular niches between the palatine arches on each side of the pharynx there is the amygdala fossa, fossa tonsillaris, where large accumulations of lymphoid (lymphoepithelial) tissue called palatine tonsils, tonsillae palatinae, are located.
The lateral surface of the palatine tonsil is adjacent to the side wall of the pharynx, separated from it by a fibrous capsule. The thickness of the capsule reaches 1 mm. Outside the capsule is a layer of loose paratonsillar tissue, which goes down to the root of the tongue, communicates in front with the tissue of the palatine-lingual arch and at the top with the submucosa of the soft palate (Fig. 3.2). With tonsillectomy (tonsillectomy), the tonsil must be separated from the pharyngeal wall along with the fibrous capsule. It should be noted that at a distance of 1-1.5 cm posterior to the palatine tonsil is the internal carotid artery.

The laryngopharynx begins at the level of the upper edge of the epiglottis and is located in front of the IV, V and VI cervical vertebrae, tapering downward in the form of a funnel. This is the narrowest part of the pharynx lying posterior to the larynx: it extends from the level of the entrance to the larynx to the lower edge of the cricoid cartilage, where the pharynx passes into the esophagus. the front wall of this part of the pharynx is the protrusion of the larynx, prominentia laringea, above which there is an opening leading to the larynx. The entrance to the larynx, aditus laringis, opens into the lumen of the larynx and pharynx in front and below. It is bounded at the front by the epiglottis, laterally by the arytenoid-epiglottis folds. On the sides of the elevation of the larynx there are rather deep pockets - pear-shaped pockets, recessus piriformis, bounded on the medial side by the wall of the larynx, with lateral - the side wall of the pharynx.

Pharyngeal blood vessels. Blood supply to the upper and middle parts of the pharynx is provided by the ascending pharyngeal artery, which is the medial branch of the external carotid artery. The ascending palatine artery, the branch of the facial artery, and the descending palatine artery, the branch of the maxillary artery, also deliver blood to the upper part of the pharynx (Fig. 3.3). Vascularization of the lower part of the pharynx occurs due to pharyngeal branches from the lower thyroid artery. In this regard, to stop bleeding from the lower pharynx, it is necessary to bandage the branches of the external carotid artery and the lower thyroid artery.

Pharyngeal veins divert blood from the venous plexus, located mainly on the outer surface of the posterior and lateral walls of the pharynx.

Throat innervation. The innervation is carried out by the branches of the glossopharyngeal and vagus nerves, as well as by the laryngopharyngeal branches from the upper cervical node of the sympathetic trunk. These branches on the outer surface of the middle pharyngeal constrictor form the pharyngeal nerve plexus, from which in turn move the motor and sensory branches that go to all three pharyngeal constrictors.

Taste analyzer. In the practice of ENT doctors have to deal with the evaluation of the taste analyzer function. Taste - a sensation arising from the action of chemical stimuli on receptors located on the surface of the mucous membrane of the tongue, as well as on the receptors of the oral cavity. The taste analyzer includes three parts: taste buds, pathways and the cortical part of the analyzer. Taste receptor cells are part of the taste buds (bulbs). A person has a total of 2,000 to 9,000 taste buds.
<< Previous Next >>
= Skip to textbook content =

CLINICAL THROAT ANATOMY

  1. Clinical pharyngeal anatomy
    The pharynx (pharynx) enters the initial section of the digestive tract and respiratory tract. It is a hollow organ formed by muscles, fascia and lined with mucous membrane from the inside. The pharynx connects the nasal and oral cavities with the larynx and esophagus, through the auditory tubes the pharynx communicates with the middle ear. The pharyngeal cavity is vertically projected onto the bases of the occipital and wedge-shaped
  2. Clinical anatomy and topography of the pharynx. Pharyngeal and periopharyngeal spaces
    The pharynx (pharynx) is the initial section of the digestive tract and respiratory tract. Three sections are distinguished in the pharynx: 1. Upper - nasopharynx, 2. Middle - oropharynx. 3. The lower is the larynx. The nasopharynx performs a respiratory function. At the top, the nasopharynx arch is fixed to the base of the skull, behind the nasopharynx it borders on the I and II cervical vertebrae, in front are the choanas,
  3. CLINICAL ANATOMY AND PHYSIOLOGY OF THE THROAT AND Esophagus
    CLINICAL ANATOMY AND PHYSIOLOGY OF THE THROAT AND
  4. Clinical physiology of the pharynx
    The pharynx is part of the digestive and respiratory tract; food and saliva pass through it into the gastrointestinal tract, and air into the larynx, lungs, and vice versa. She takes part in the following vital functions: the act of eating - sucking and swallowing; voice and speech education; act of breathing; protective mechanisms during eating and breathing, as well as in taste function. Etc
  5. Clinical anatomy of the larynx
    The larynx (larynx) enters the initial part of the respiratory tract, the upper section of which opens into the pharynx, the lower part passes into the trachea. The larynx is located under the hyoid bone, on the front of the neck. In thin men, the contours of the larynx are well outlined. In adult men, the upper edge of the larynx is located on the border of CIV and Cv, and the lower one corresponds to Cvi (Fig. 3.1). In newborns,
  6. Clinical anatomy of the esophagus
    The esophagus - one of the most important organs of the digestive system, is a natural continuation of the pharynx, connecting it to the stomach. It is a smooth, stretching fibro-muscular mucous tube, oblate in the anteroposterior direction. The esophagus begins behind the cricoid cartilage at its lower edge, which corresponds to level VI-VII of the cervical vertebrae and ends at the cardia
  7. CLINICAL ANATOMY IN ANESTHESIOLOGY AND REANIMATOLOGY
    A doctor specializing in anesthesiology and resuscitation should not only study practical anesthesiology and resuscitation, but also replenish knowledge in the field of physiology, pathophysiology, pharmacology, as well as anatomy, the knowledge of which is necessary during anesthesia and resuscitation. This chapter provides data on normal and topographic anatomy necessary for
  8. Clinical anatomy and physiology of the esophagus
    The esophagus (oesophagus) is a continuation of the pharynx from the level of the lower edge of the cricoid cartilage (CV]) and is a flattened anteroposterior muscle tube 24-25 cm long. The esophagus passes into the stomach at the Thxi level, which corresponds to the site of attachment of the VII costal cartilage to the sternum. The total distance from the front teeth (through the mouth, pharynx and esophagus) to the stomach
  9. Clinical anatomy and topography of the esophagus
    The esophagus (oesophagus) is a continuation of the pharynx from the level of the lower edge of the cricoid cartilage (VI cervical vertebra). The esophagus passes into the stomach at the level of the 11th thoracic vertebra. The esophagus is a flattened anteroposterior direction tube 24-25 cm long. Three sections are distinguished in the esophagus: 1. Cervical. 2. Thoracic. 3. The abdominal. In the cervical and early thoracic
  10. Clinical anatomy and topography of the larynx
    The larynx (larynx) enters the initial part of the respiratory tract. The upper section opens to the throat, and the lower passes into the trachea. The upper edge of the larynx is at the level of the V cervical vertebra, and the lower is at the level of the VI cervical vertebra. The laryngeal skeleton consists of cartilage connected by ligaments. Among them are three unpaired: epiglottis (cartilago epiglotica) thyroid (cartila "o thyreoidea),
  11. CLINICAL ANATOMY OF THE EAR
    Distinguish the outer, middle and inner ear. Inner ear - labyrinth consists of a cochlea, vestibule and semicircular canals. The cochlea, the outer and middle ear are an organ of hearing, which includes not only the receptor (Corti's organ), but also a complex sound-conducting system designed to deliver sound vibrations to it. In anticipation and semicircular canals of the inner ear
  12. CLINICAL ANATOMY OF THE LARYNX
    The larynx is a hollow organ that consists of a cartilaginous skeleton, ligamentous apparatus and own muscles. The laryngeal cavity is lined with a mucous membrane from the inside. The larynx has the appearance of a short socket located above the trachea at the level of the bodies of IV, V and VI cervical vertebrae. However, when swallowing and voice formation, it significantly exceeds the specified boundaries, shifting up and down. Organ mobility
  13. CLINICAL ANATOMY AND PHYSIOLOGY OF THE UPPER RESPIRATORY AND EAR. RESEARCH METHODS OF ENT ORGANS
    Otorhinolaryngology is a science and practical discipline about diseases of the ear, nose, pharynx and larynx (abbreviated as ENT). Given the applied nature of the manual, it is advisable to provide the main content - a description of the diseases - with information on the clinical anatomy, physiology and research methods of these organs. Since diseases of ENT organs are often interconnected with pathology nearby
  14. Clinical anatomy of the external ear
    The outer ear includes the auricle (auricula) and the external auditory meatus (meatus acusticus extemus). The auricle is located between the temporomandibular joint in front and the mastoid process in the back. It distinguishes between the external concave and internal convex surface facing the mastoid process. The base of the auricle is a plate of elastic cartilage of complex shape
  15. Clinical anatomy of the trachea and bronchi
    The respiratory throat or trachea is a direct continuation of the larynx and refers to the initial section of the lower respiratory tract. The trachea is a hollow elastic tube, somewhat compressed in the anteroposterior direction. Above, through the cricoid-tracheal ligament, it connects to the larynx, below, in the bifurcation area, it is divided into two main bronchi. Distinguish in the trachea
Medical portal "MedguideBook" © 2014-2019
info@medicine-guidebook.com