Which cranial nerves develop from pharyngeal arches?
In humans
| Pharyngeal arch | Muscular contributions | Nerve |
|---|---|---|
| 2nd (also called the “hyoid arch”) | Muscles of facial expression, buccinator, platysma, stapedius, stylohyoid, posterior belly of the digastric, auricular | Facial nerve (VII) |
| 3rd | Stylopharyngeus | Glossopharyngeal nerve (IX) |
What are the components of pharyngeal apparatus?
the entire apparatus consists of paired pharyngeal arches, pharyngeal pouches, pharyngeal clefts (or grooves), and pharyngeal membranes (see diagram).
- each pharyngeal arch consists of a core of somatic mesoderm and neural crest mesenchyme.
- each pharyngeal arch has a cranial nerve associated with it:
Which is the cranial nerve associated with structures of the hyoid arch?
Arch: the body of the hyoid, greater horn of hyoid, superior constrictor muscles, internal carotid arteries, CNIX. Pouch: thymus, piriform recess, inferior parathyroid glands. Nerve: glossopharyngeal nerve (CN IX)
What is the pharyngeal apparatus?
The oral or pharyngeal apparatus serves the dual functions of respiration and feeding in many species in the animal kingdom. In humans, the mouth, nose and associated sinus, together with the pharynx which is connected to the larynx and trachea, form the upper respiratory tract.
What does the first pharyngeal pouch form?
The first pharyngeal pouch develops into the middle ear cavity and the eustachian tube, which joins the tympanic cavity to the nasopharynx. The inner surface of the eustachian tube is covered by a mucosal layer of ciliated cells, supporting cells, secretory cells, and connective tissue.
What are the derivatives of first pharyngeal arch?
The first pharyngeal arch–derived maxillary prominences fuse to form the intermaxillary segment which gives rise to the following oral cavity structures: philtrum of the lip, the maxilla and incisors, and the primary palate.
What is a pharyngeal pouch?
A pharyngeal pouch, also known as Zenker’s diverticulum, occurs when part of the pharyngeal lining herniates through the muscles of the pharyngeal wall. This occurs mainly in older people. Presenting symptoms include dysphagia, regurgitation of undigested food, halitosis, hoarseness, and chronic cough.
What is the pharyngeal arch?
Anatomy: Pharyngeal arches are paired structures that grow on either side of the future head and neck of the developing embryo and fuse at the centerline. Pharyngeal arches produce the cartilage, bone, nerves, muscles, glands, and connective tissue of the face and neck.
Are there mnemonics for remembering the names of the cranial nerves?
There are many cranial nerve mnemonics that can be memorable and rude/lewd. Either way, they can be helpful for remembering the names of the twelve cranial nerves, as well as remembering which nerves are sensory, motor, or both. Remembering cranial nerve names in order of CN I to CN XII: Ooh, ooh, ooh to touch and feel very good velvet.
How is the pharyngeal arch related to the cranial nerve?
Each arch is innervated by an arch-associated cranial nerve , and has a muscular component, a skeletal and cartilaginous supporting element. as well as a vascular component. In the adult, each pharyngeal arch is associated with specific structures within the head and neck.
Which is the mnemonic for remembering functional information?
Remembering functional information: Ooh, Ooh, Ooh, to touch and feel very good velvet. Such heaven! If you write out the mnemonic for remembering the names next to the mnemonic for their function then they will align giving you an easier way to remember both the cranial nerve names and their function.
What are the different types of cranial nerves?
S: sensory (olfactory nerve – CN I) S: sensory (optic nerve – CN II) M: motor (oculomotor nerve – CN III) M: motor (trochlear nerve – CN IV) B: both (trigeminal nerve – CN V) M: motor (abducens nerve – CN VI) B: both (facial nerve – CN VII) S: sensory (vestibulocochlear nerve – CN VIII)