Head and Neck Flashcards
Enclose Submandibulas and Parotid glands
Superficial Layer of deep cervical fascia
Contains sternal heads of SCM, loose areolar tissue, jugular venous arch, interclavicular ligament
Suprasternal Space of Burns
Forms false capsule of the thyroid gland
Pretracheal Layer
Forms the fascial floor of the posterior triangle
Prevertebral layer
Outer to inner layer of the neck
- Superficial cervical fascia
- Platysma
- Deep cervical fascia
Cranial nerve descends in the Carotid sheath
Vagus
Lateral, medial and posterior of Carotid sheath
L- IJV
M- common and ICA
P- vagus nerve
Potential space at deep cervical fascia between vertebral and visceral compartments
Retro pharyngeal space
Ludwigs angina involves which fascial planes
Submandibular space
Supply muscles of facial expressions
CERVICAL BRANCH OF FACIAL NERVE (CN VII)
Neck twisting and chin pointing to opposite side from injury of SCM or avulsion of Accessory nerve
Torticollis/ Wryneck
Level of HYOID bone
C3
Only bone don’t articulate with another bone. For moving of tongue base
HYOID bone
Suprahyoid muscles
Anterior and posterior DIGASTRIC
Mylohyoid
Stylohyoid
Geniohyoid
INFRAHYOID muscles
Thyrohyoid
Sternothyroid
Omohyoid
Sternohyoid
Elevates HYOID
SUPRAHYOID muscles
Depress hyoid
Omohyoid
Sternohyoid
Thryohyoid
Depress larynx
Sternothryoid
Elevates larynx
Thyrohyoid
Boundaries of ANTERIOR TRIANGLE
ant. Border of SCM
ant. Midline of neck
Inf. border of mandible
Boundaries of POSTERIOR triangle
Post. Border of SCM
ant. Border of trapezius
Boundaries of SUBMENTAL triangle
Ant. Belly of Digastri
Hyoid bone
Floor- mylohyoid
Muscle separating submandibular and sublingual space
Mylohyoid
Boundaries of SUBMANDIBULAR triangle
Digastric
Inf. mandible
Floor- mylohyoid
Upper portion of carotid sheath corssed obliquely and anteriorly by:
Posterior digastric
Boundaries of ANTERIOR triangle
Superior omohyoid
Post. Digastric
Ant. SCM
Palpation of CAROTID PULSE
Superior border of thyroid cartilage
Boundaries of muscular triangle
Superior omohyoid
Ant. Digastric
Ant. SCM
Nerve crosses occipital triangle
Accessory Nerve
Blood vessels crosses SUPRACLAVICULAR triangle/ subclavian triangle
EJV and subclavian artery
Level of base of thryoid
4th or 5th tracheal ring
Location of pyramidal lobe
Left of midline
Connects pyramidal lobe to hyoid
LEVATOR GLANDULAE THYROIDEA
Midline artery below isthmus of thyroid
Thyroidea Ima artery
Level of thyroid cartilage
C4-C5
Level cricoid cartilage
C6
Blood supply of superior and inferior thyroid
Superior- external carotid
Inferior- thyrocervical trunk of subclavian artery
Drain superior and middle thyroid
IJV
Drain inferior thyroid
Brachiocephalic
First endo gland to develop
Thyroid gland
MC loc of ectopic thyroid
LINGUAL
Midline, near hyoid bone, moves with swallowing or tongue protrusion
thyroglossal duct cyst
Lateral to midline, anterior to SCM, not move when swallowing
Brachial cleft cyst
Lie along INTERNAL JUGULAR VEIN in Carotid triangle
Superior deep cervical LN
Lie on INTERNAL JUGULAR VEIN near Subclavian vein
Inferior deep cervical LN
Where deep cervical LN empty
Thoracic duct- left
Right lymphatic duct- right
Cervical LN where thyroid malig first mets
Cervical LN V
LN mets of primary oral cavity and lip tumors
Level i, ii, iii
LN mets of oropharynx, hypopharynx, and larynx
Level ii, iii, iv
LN mets of nasopharyngeal and thyroid malig
Level V
Contain opening of auditory rube and pharyngeal tonsils
Nasopharynx
Contains palatine and lingual tonsils
Oropharynx
Opens to larynx and esophagus
Laryngopharynx
Afferent fibers of gag reflec
Glossopharyngeal nerve
Efferent of gag reflex
Vagus nerve
Innervate nasal pharynx
Maxillary nerve V2 of CN V
Oral pharynx innervation
CN IX
laryngeal pharynx innervation
CN X
Afferent of pupillary light reflex
CN II
Efferent of Pupillary light reflex
CN III
Afferent of corneal reflex
CN V
Efferent of corneal reflex
CN VII
Nerve damage in tonsillectomy
CN IX
Components of WALDEYER RING
Lateral: palatine and tubal tonsils
Upper: pharyngeal tonsil
Lower: lingual tonsils
Level of larynx
C4, C5, C6
Forms laryngeal prominence in the neck
Thyroid cartilage
Unpaired laryngeal cartilages
Thyroid, cricoid, epiglottis
Paired laryngeal cartilages
Arytenoid, cuneiform, corniculate
Connects upper thyroid cartilage to hyoid. Pierced by superior laryngeal vessels and internal laryngeal nerve
Thyrohyoid membrane
Connects cricoid cartilage to first ring of trachea
Cricotracheal ligament
Immediately inferior to thyroid cartilage
Cricothyroid membrane
What lies above cricoid cartilage
True vocal cords
Fixed, formed by mucous membrane, vascular, pink in color
False vocal folds
Mobile, voice production, formed by mucous membrane, avascular, white
True vocal folds
Narrowest part of laryngeal cavity, space between vocal folds and arytenoid cartilages
Rima glottidis
Nerve injury in ligation of superior thyroid artery
External laryngeal
Inferior thyroid artery associated with what nerve
Inferior/recurrent laryngeal nerve
Nerve supply cricothyroid
External Laryngeal nerve
Supply motor to muscles of phonation except cricothyroid
Inferior/ recurrent laryngeal nerve
Chief tensor of vocal cords
Cricothyroid
Muscle allow air movement through larynx
Posterior arytenoids
Abduction of vocal fold
Post. Cricoarytenoid
Adductor of vocal cords
Lateral cricoarytenoid
Where does RIGHT laryngeal nerve cross?
Right subclavian artery
Where left recurrent laryngeal nerve cross
Aortic arch
Injury to what nerve results to cannot producer HIGH PITCH SOUNDS
EBSLN
nerve injury results to HOARSENESS/ BREATHINESS
Recurrent LN
Blood supply of Larynx
Upper half- superior thyroid artery
Lower half- inferior thyroid artery
Level of trachea
T4
Blood supply of trachea
Upper 2/3- inferior thyroid artery
Lower- bronchial arteries
Improper division of foregut by tracheoesophageal septum
TEF
MC TEF
Esophageal atresia with distal TEF
Blood supply of Parathyroid gland
Superior and Inferior Thyroid arteries
Venous of Parathyroid glands
Superior, middle, inferior thyroid
Cells secrete PTH
Chief cells
Supporting cells of Parathyroid gland
Oxyphil cells
Secret CALCITONIN in thyroid gland
Para follicular cells (c cells)
Formed by first four cervical nerves (C1-C4)
Cervical plexus
Branches of cervical plexus
Cutaneous, Muscular branches, Phrenic
Only motor nerve supply of diaphragm
Phrenic nerve (C3, C4, C5)
Boundaries of phrenic nerve
Post- subclavian vein
Ant- subclavian artery
Lat- common carotid
Neck Zones:
Zone 1:
Zone 2:
Zone 3:
Zone 1: root of neck to inferior border of cricoid
Zone 2: cricoid was to angle of mandible
Zone 3: above level of angle of mandible