The trigeminal nerve is the largest and most complex of the 12 cranial nerves (CNs). It supplies sensations to the face, mucous membranes, and other structures of the head. It is the motor nerve for the muscles of mastication and contains proprioceptive fibers.
Which is the smallest cranial nerve?
The trochlear nerve is the fourth paired cranial nerve. It is the smallest cranial nerve (by number of axons), yet has the longest intracranial course.
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 cranial nerve 1 called?
Cranial Nerves
| Number | Name | Function |
|---|---|---|
| I | Olfactory Nerve | Smell |
| II | Optic Nerve | Vision |
| III | Oculomotor Nerve | Eye movement; pupil constriction |
| IV | Trochlear Nerve | Eye movement |
Which nerve is the longest?
The sciatic nerve is the largest nerve in your body. It begins in your lower back and travels all the way down to the heel of your foot.
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 shortest nerve in the body?
It is the smallest nerve in terms of the number of axons it contains. It has the greatest intracranial length. It is the only cranial nerve that exits from the dorsal (rear) aspect of the brainstem.
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| Trochlear nerve | |
|---|---|
| FMA | 50865 |
| Anatomical terms of neuroanatomy | |
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.
Which cranial nerve has longest Intradural course?
CN 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 sixth cranial nerve?
Cranial nerve six (CN VI), also known as the abducens nerve, is one of the nerves responsible for the extraocular motor functions of the eye, along with the oculomotor nerve (CN III) and the trochlear nerve (CN IV).
How do you test for cranial nerve 10?
The motor division of CN 9 & 10 is tested by having the patient say “ah” or “kah”. The palate should rise symmetrically and there should be little nasal air escape. With unilateral weakness the uvula will deviate toward the normal side because that side of the palate is pulled up higher.
How do you test cranial nerve function?
Light touch is tested in each of the three divisions of the trigeminal nerve and on each side of the face using a cotton wisp or tissue paper. The ophthalmic division is tested by touching the forehead, the maxillary division is tested by touching the cheeks, and the mandibular division is tested by touching the chin.
Is sciatic nerve on right or left?
The five nerve roots come together to form a right and left sciatic nerve. On each side of your body, one sciatic nerve runs through your hips, buttocks and down a leg, ending just below the knee. The sciatic nerve then branches into other nerves, which continue down your leg and into your foot and toes.
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.
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).