Flashcards in The Head: Scalp, The Face, The Orbit, The Eyeball, The Ear, and The Parotid Region Deck (67)
What can the five layers of the scalp spell?
Skin, Connective tissue, Aponeurosis, Loose Connective Tissue, Periosteum... SCALP
What are the principal sources of blood to the scalp?
Internal carotid and external carotid artery branches
What location will each branch of the fifth cranial nerve pass into upon exit from the middle cranial fossa?
Ophthalmic nerve-orbit; maxillary nerve- pterygopalatine region; mandibular nerve- infratemporal region
Which divisions of the trigeminal nerve receive sensory information from the scalp?
All 3 divisions: ophthalmic nerve, maxillary nerve, and mandibular nerve
What nerve(s) and cord levels of origin to the cervical plexus supply the scalp?
Greater auricular nerve- C2, C3 ventral rami branches; Lesser occipital nerve- C2(C3) ventral rami branches
Which dorsal ramus nerve branch (name and cord level of origin) supplies the scalp?
Greater occipital nerve- C2, C3 communicating ramus
What nerve(s) provide motor innervation to the scalp?
Facial nerve branches
What type of motor fibers to skeletal muscle are given off by the facial nerve?
Branchial efferent (BE)
What is the embryonic origin of skeletal muscles innervated by the facial nerve?
The skeletal muscle is derviced from teh branchial arches hence branchial efferent
What is the third layer of the scalp associated with?
Muscular component of the scalp
What muscle(s) are specifically associated with the scalp?
Frontalis and occipitalis bellies of the epicranius muscle
The bellies of the epicranius muscle are connected by what structure?
What is unusual/unique about the muscles of the face?
They do not act as lever muscles; they do not attach to bone at both origin and insertion
Which muscles lack any attachment to bone?
Orbicularis oris, procerus, and risorius
What is the source of innervation for all muscles of facial expression?
Facial nerve branches
What opening(s) are located along the superior wall of the orbit?
What are the contents of the optic canal?
Optic nerve and ophthalmic artery
What is the name given to the medial wall of the orbit?
What opening(s) are located along the lateral wall of the orbit?
Superior orbital fissure
What opening(s) are located along the inferior wall of the orbit?
Inferior orbital fissure
What is contained int eh inferior orbital fissure?
Maxillary division fo trigeminal nerve
What are the layers of the eyelid?
Skin, orbicularis oculi muscle, tarsal plate/tarsus, and palpebral conjunctiva
What are the names given to the modified sebaceous gland in the tarsus of the eyelid?
Tarsal or Meibomian gland
What is the location of the Meibomian gland?
Tarsus of the eyelid
What is the function of the Meibomian gland?
Produces a thick, hydrophobic substance that prevents tears from overflowing onto the cheeks along the margin of the eyelid
What is the name of the modified sebaceous gland at the base of the eyelash?
Visceral efferent fibers conveyed in the seventh cranial nerve originate from which nucleus?
Superior salivary nucleus
Preganglionic visceral efferent fibers of cranial nerve VII will exit the pons in what nerve?
Nervus intermedius, nerve of Wrisberg, sensory root of facial nerve
Which immediate branch of the seventh cranial nerve will convey preganglionic parasympathetic efferent fibers to the lacrimal gland?
Greater petrosal or greater superficial petrosal nerve