Superficial Face and Scalp Flashcards
What are the five layers of the scalp
Skin
Dense connective tissue: Holds vasculature and holds them open
Aponeurosis: Connects muscles of facial expression (Occipitofrontalis)
Loose Connective tissue: potential spread of infection due to its potential space
Pericranium
Scalp injuries and the impact on the vasculature
Since the vasculature in the head runs from inferior to superior, most of it will be fine for reattachment of the scalp
How does a scalp wound become gaping
If the cut penetrates through the aponeurosis it becomes a Gaping wound (due to the pull of the muscles)
What are some relationships between with the parotid gland
The Parotid Gland duct dives into the Buccinator Muscle
CN VII passes through the Parotid Gland
What nerve closes the eye
Facial Nerve (CN VII) by innervating the Orbicularis oculi Muscle (Orbital, Palpebral)
Some muscles of Facial Expression
Occipitofrontalis Corrugator Supercilii Procerus Nasailis Orbicularis oculi Levator labii superioris Depressor anguli oris Mentalis Buccinator Orbicularis Oris Zygomaticus Major Zygomaticus Minor Platysmus
Muscles of Mastication
Temporalis
Masseter
Lateral Pterygoid M : Upper and lower head
Medial Pterygoid M : superfical and deep head
What are the 5 branches of the Facial Nerve
Temporal Zygomatic Buccal Mandibular Cervical
What nerve carries taste for CN VII
Chorda Tympani
also carries Parasympathetics to the submandibular and sublingual salivary glands
What nerve carries Parasympathetic fibers to the lacrimal Gland
Greater Pretrosal Nerve
What foramen does CN VII exit
Stylomastoid Foramen
Pathway of Parasympathetic motor to lacrimal gland
Greater pertrosal nerve arises from CN VII and emerges from the superior surface of petrous part of the temporal bone to enter middle cranial fossa
Greater pretrosal Nerve then joins deep petrosal nerve (Sympathetics) to become nerve of pterygoid canal
nerve of pterygoid canal travels through pterygoid canal and enters pterygopalatine fossa
Parasympathetic fibers then synapse on the pterygopalatine ganglion
then they will innervate the lacrimal gland via the zygomatic branch of V2 and lacramal nerve branch of V1
Visceral parasympathetic motor to submandibular and sublingual glands
The chorda tymani branch arises from CN VII just superior to styloid mastoid foramen carrying taste 2/3 of the tongue and GVE
Crosses the tympanic cavity medial to handle of malleus
The chorda tympani passes through the petrotympanic fissure between tympanic and pterous parts of the temporal bone to join lingual nerve V3 in infratemporal fossa
Parasympathetic fibers of chorda tympani synapse in submandibular ganglion and post synaptic fibers follow arteries to glands
What cell bodies make up the geniculate ganglion
sensory cell bodies
Cutaneous Sensation to the face via the Trigeminal Nerve: Opthalmic
Supraorbital N Supratrochlear N Palpebral branch of lacrimal N Infratrochlear N External nasal branch of Ethmodial N