week 8: head, neck, eyes, ears, nose, mouth Flashcards
what is the skull
Protects brain/sensory organs
Includes bones of the cranium, face
Bones, sutures, orbit, upper/lower jaw
parts of the face
Facial expression, expresses mood
Facial muscles (CNV Trigeminal; mastication)
Salivary Glands (Parotid, Submandibular, Sublingual)
Temporal Artery (anterior to the ear)
parts of the neck
Sternocleidomastoid Muscle (Rotates head) and Trapezius (Shoulder Elevation)
Controlled by CN XI - Spinal Accessory
Thyroid Gland
Highly vascular endocrine gland
Synthesizes/Secretes Thyroxine (T40) and Triiodothyronine (T3)
Butterfly; has 2 lobes between tracheal/sternomastoid muscles
Hyoid Bone: Floating bone, top of the neck
Thyroid Cartilage (above thyroid, cricoid, has Adam’s apple)
Cricoid Cartilage (between thyroid and thyroid cartilage)
parts of the lymphatic system
Extensive throughout head/neck, major part of the immune system
Detects and eliminates foreign substances
Lymph nodes: Small oval clusters of lymphatic tissue
Engulfs pathogens, prevents harmful substances from entering circulation
You have to palpate all of them:
3 Around the Ear (Preauricular -> Posterior Auricular -> Occipital) -> 4 around the Jaw (Submental, Submandibular, Jugulodigastric/Tonsillar, Parotid), 4 around the Neck (Superficial Cervical, Deep Cervical Chain, Posterior Cervical, Supraclavicular,)
Use two fingers, light-to-medium touch
sinuses
Hollow areas in bones that help with voice resonance, lightens skull weight
Present at birth; in Frontal, Maxillary, Ethmoid, and Sphenoid bones
carotid artery
Common Carotid; branches into internal/external carotids up head, palpate one at a time
pediatric fontanelles
In children, the sutures are not fully formed yet.
Anterior, Posterior, Sphenoid, Mastoid Fontanelles
Skull is not yet fused when born; allows for birth, growth of the brain
Posterior closes by 1-2 months, Anterior closes by 9 months - 2 years
Normally film, slightly concave
Shrunken = Dehydration
Bulging = Increased ICP (edema, bleed, not good)
They also look like they have no neck; it’s shorter, no control of neck muscles yet
nose
First segment of respiratory system; warms, moistens, filters air in nasal cavity
Has the sinuses inside
Shaped like a triangle with 2 oval openings at the base; divided in half by the septum
mouth
First segment of the digestive system; also an airway for respiratory system
Bordered by the lips, palate, cheek, tongue
Contains teeth, gums, tongue, salivary glands (parotid, submandibular, sublingual)
Adults have 32 permanent teeth; children have up to 20 deciduous (baby) teeth
Age in months - 6 = number of teeth
Don’t give bottle while lying down = pools in mouth, tooth decay
Xerostomia: Decreased saliva production
throat
(Pharynx)
Area behind the mouth and nose
Separated from the mouth by the tonsils (check for these), uvula
eyelids
Palpebra; protects the eye from foreign substances with eyelashes
Canthus; Where they meet (medial/lateral), Caruncle (has sebaceous glands)
conjunctiva
Transparent protective mucous membrane, between eyelids, eyeball
Bulbar (on eyeball) and Palpebral (on the eyelid)
extraocular muscles
There are 6. Controlled by CN’s III, IV, VI (Most are 3, other than LR6, SO4)
sclera
the white
cornea
outer covering the helps bend light into pupil
pupil
dark, round hole - lets light in
lens
focuses light
retina
actually receives light, has photoreceptors
optic disc
where the optic nerve is
macula/fovea centralis
super high visual acuity point
ear
sensory organ for hearing and balance; conducts sounds waves