Quick Answer: What Is The Largest Cranial Nerve?

What is the strongest nerve in human body?

Sciatic nerve, largest and thickest nerve of the human body that is the principal continuation of all the roots of the sacral plexus..

What is the most complex organ of the endocrine system?

Most complex organ of the endocrine system. This gland affects almost every physiologic process of the body: growth, blood pressure, contractions during childbirth, breast-milk production, sexual organ functions in both women and men, thyroid gland function and the conversion of food into energy (metabolism).

Which cranial nerve has longest Intradural course?

CN IIICN III, IV & VI: Oculomotor, Trochlear & Abducent Nerves It is also the only cranial nerve to emerge from the dorsal side of the brainstem and, consequently, has the longest intradural (intracranial) course of any cranial nerve.

Which is the shortest cranial nerve?

trochlear nerveThe trochlear nerve is the fourth paired cranial nerve. It is the smallest cranial nerve (by number of axons), yet has the longest intracranial course.

What is the smallest nerve in human body?

The trochlear nerve is unique among the cranial nerves in several respects: It is the smallest nerve in terms of the number of axons it contains. It has the greatest intracranial length.

What is the only cranial nerve to extend beyond the head neck region?

Vagus nerveVagus nerve (CN X) is the only cranial nerve that innervates the structures beyond the head and neck region.

What cranial nerve makes you cry?

The great (superficial) petrosal nerve from cranial nerve VII provides autonomic innervation to the lacrimal gland. It is responsible for the production of much of the aqueous portion of the tear film.

Which is the thickest cranial nerve?

The largest cranial nerve is trigeminal nerve. The smallest cranial nerve is abducens nerve. The thinnest cranial nerve is trochlear nerve.

What is the 12th cranial nerve?

The Hypoglossal Nerve is the 12th Cranial Nerve (Cranial Nerve XII). It is mainly an efferent nerve for the tongue musculature. The nerve originates from the medulla and travels caudally and dorsally to the tongue.

Do you have nerves in your brain?

Nerves that directly connect the brain and the brain stem with the eyes, ears, nose, and throat and with various parts of the head, neck, and trunk are called cranial nerves. There are 12 pairs of them (see Overview of the Cranial Nerves).

What is the fattest cranial nerve?

The trigeminal nerve is the largest cranial nerve and is the great sensory nerve of the head and face, and the motor nerve of the muscles of mastication.

What body part sends messages to the brain?

For example, sensory neurons send information from the eyes, ears, nose, tongue, and skin to the brain. Motor neurons carry messages away from the brain to the rest of the body.

What is the main nerve in your body?

The sciatic nerve is the largest and longest spinal nerve in the human body. Extending from the lumbar and sacral plexuses in the lower back, the sciatic nerve runs through the buttocks and into the thighs. It delivers nerve signals to and from the muscles and skin of the thighs, lower legs and feet.

Do nerves carry blood?

The main difference between nerve and vein is that nerve is an axon bundle of neurons in the peripheral nervous system, which carries nerve impulses whereas veins are blood vessels, which return deoxygenated blood towards the heart. Both nerves and veins vary in size.

What number is the trigeminal nerve?

5Neuroanatomy, Cranial Nerve 5 (Trigeminal)

What is the largest of the cranial nerves Milady?

CardsTerm How many bones in the cuneiform bones?Definition 3Term Largest of the cranial nerve; Chief sensory nerve of the face; Serve as the motor nerve of the muscles that control chewing.Definition Fifth Cranial Nerve (Trifacial Nerve / Trigeminal Nerve)231 more rows•Dec 6, 2010

How do you test for cranial nerve 12?

The 12th (hypoglossal) cranial nerve is evaluated by asking the patient to extend the tongue and inspecting it for atrophy, fasciculations, and weakness (deviation is toward the side of a lesion).

Which side of the neck is the vagus nerve on?

On the right side, it arises from the trunk of the vagus as it lies beside the trachea. On the left side, it originates from the recurrent laryngeal nerve only.

What is the longest cranial nerve in the human body?

The vagus nerve (cranial nerve [CN] X) is the longest cranial nerve in the body, containing both motor and sensory functions in both the afferent and efferent regards.

What are the 3 types of cranial nerves?

There are three cranial nerves with primarily sensory function. Link to Sensory. Cranial nerve I, Olfactory, modulates smell, cranial nerve II, Optic,modulates vision. Cranial nerve VIII, Acoustovestibular, modulates hearing and balance.

Which body part sends messages to the brain Milady?

Terms in this set (60) aka: afferent nerves – carry impulses or messages from the sense organs to the brain. Sensory nerve endings called receptors are located close to the surface of the skin.