Week 3 RS Flashcards
what are the 5 layers of the scalp?
skin, dense connective tissue, the epicranial aponeurosis, loose connective tissue and pericranium
describe the vasculature of the scalp
supplied by branches of both the internal and external carotid arteries. These branches
anastomose freely with each other
what does the scalp consist of?
skin and subcutaneous tissue covering the neurocranium
where are the muscles of facial expression derived from embryologically?
from the second pharyngeal arch
what are the muscles of facial expression supplied by
the facial nerve, the seventh cranial nerve
what does each orifice have?
a sphincter, an opposing dilator, elevator, and depressor
arrangement of muscles
what is the primary fuction of the muscles of facial expression
to control the respective orifices
what is the secondary function of the secondary effects of the muscles of facial expression
facial expression
how are the muscles of facial expressions divided?
into groups that guard/control the main orifices of the face (orbit,
nose, mouth)
what are the 4 groups of the muscles of facial expression and detail what they contain
the muscles of the eyelids: sphincter dilators/elevators
the muscles of the nostrils: sphincter dilators/elevator
the muscles of the lips and cheeks: sphincter dilators
what is the shape of the infratemporal fossa?
irregularly shaped three-dimensional space
where is the infratemporal fossa?
lying deep to the
ramus of the mandible
what does the infratemporal fossa contain?
It contains the pterygoid muscles, and nerves to the mandibular teeth
and tongue pass through this
boundaries of the infratemporal fossa
maxillia mandibular process styloid process typanic plate lateral pterygoid plate mastoid process
contents of the infratemportal fossa?
lateral and medial pterygoid muscles
The maxillary artery
The inferior alveolar and lingual nerve
which arteries supply the head and neck
head and neck are supplied with arterial blood via the common carotid arteries and
branches of the subclavian arteries
what does the internal carotid and vertebral arteries supply?
The cranial cavity and brain
what does the external carotid supply?
the face and upper neck
where is the internal jugular relative to the common carotid artery in the neck
The internal jugular vein
lies lateral to the common carotid artery in the neck
where is the vagus nerve found
posterior to these vascular structures
what is enclosed within the carotid sheath
artery, vein, nerve
where is the hypoglossal nerve and which crainal nerve is it? and what is its path
the 12th cranial nerve, can be seen crossing lateral to the external carotid artery (just superior to the carotid bifurcation) towards the tongue which it supplies with motor fibres.
