Lab-organs & Muscles Of Head Ch. 6 Flashcards
Muscles of facial expression are innervated by which Nerve?
Cranial Nerve VII-facial
Where is the epicranius located?
What’s it’s function?
What 2 muscles form it?
Under the scalp from forehead to occipital region
Acts to raise eyebrows and wrinkle brow
Frontalis
Occipitalis
Action of frontalis
Nerve innervation
Wiggles your eyebrows
Cranial Nerve VII-facial
Action of occipitalis
Wiggle your ears
Where and what is the action of orbicularis oculi?
Nerve innervation?
Sphincter muscle of eye
Acts to close eyelids
Cranial nerve VII-facial
The sphincter muscle of the oral region
Its nerve innervation
Orbicularis Oris
Acts to close lips
Cranial nerve VII- facial nerve
Action of Buccinator
Nerve innervation?
Acts to compress the cheek
(Can’t be identified on the model)
Cranial Nerve VII-facial
Function of platysma muscle
Innervation?
Acts to draw the angle of mouth and lower lip inferiorly
Cranial nerve VII-facial
(Will be on the model with gray bottom)
It’s underneath the depressor
Function of zygomaticus major
Innervation?
Acts to draw the angle of the mouth superiorly as in smiling
Cranial nerve VII- facial
Action of depressor labii inferioris
Innervation?
Acts to draw the lower lip inferiorly as in frowning or pouting
Cranial nerve VII- facial
4 muscles of mastication
Innervation?
Masseter
Temporalis
Medial pterygoid
Lateral pterygoid
Cranial nerve V-trigeminal
Innervation for the muscles of the pharynx and palate
Cranial nerve X- vagus
What makes up the lacrimal apparatus?
Function?
- Lacrimal glands
- Lacrimal duct
- Lacrimal sac
- Nasolacrimal duct
Produces tears and allows them to drain from the eye to the nose
What are the 8 structures in the mediastinum?
- Thymus
- Trachea
- Esophagus
- Lymph nodes
- Thoracic duct
- Right and left vagus CN X
- Phrenic nerves
- Heart
