Is Trochlear nerve sensory or motor?

No. Name Sensory, motor, or both
IV Trochlear Motor
V Trigeminal Both sensory and motor
VI Abducens Mainly motor
VII Facial Both sensory and motor

What is the function of Trochlear nerve is it a sensory or motor nerve or both?

Trochlear nerve. The trochlear nerve controls your superior oblique muscle. This is the muscle that’s responsible for downward, outward, and inward eye movements. It emerges from the back part of your midbrain.

Which cranial nerves are sensory motor or both?

Cranial nerves I, II, and VIII are pure sensory nerves. Cranial nerves III, IV, VI, XI, and XII are pure motor nerves. Cranial nerves V, VII, IX, and X are mixed sensory and motor nerves.

Which cranial nerve is motor?

There are four cranial nerves with primarily motor function. Link to Corticobulbar. CN IV, Trochlear, innervates the superior oblique muscle of the eyeball. CN VI, Abducens, innervates the lateral rectus muscle of the eyeball and abducts the eye.

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Which cranial nerves are somatic motor sensory and parasympathetic?

Nerves in Order Modality Function
Olfactory Special Sensory Smell
Optic Special Sensory Vision
Oculomotor Somatic Motor Visceral Motor Levator palpebrae, superioris, superior, medial & inferior recti muscles Parasympathetic to ciliary & pupillary constrictor muscles
Trochlear Somatic Motor Superior oblique muscle

What is the main function of the Trochlear nerve?

The primary function of the trochlear nerves (IV) is also motor, controlling eye movements. These nerves originate in the midbrain, passing through the superior orbital fissures of the sphenoid bone, to reach the superior oblique muscles. The trochlear nerves are the smallest of the cranial nerves.

Why is it called Trochlear nerve?

Motor Function

As the fibres from the trochlear nucleus cross in the midbrain before they exit, the trochlear neurones innervate the contralateral superior oblique. The tendon of the superior oblique is tethered by a fibrous structure known as the trochlea, giving the nerve its name.

Is the vagus nerve sensory or motor?

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 is the difference between cranial nerves and spinal nerves?

Cranial nerves are the nerves that emerge directly from the brain (including the brainstem). In contrast, spinal nerves emerge from segments of the spinal cord. Cranial nerves relay information between the brain and parts of the body, primarily to and from regions of the head and neck.

What is the signs of nerve damage?

The signs of nerve damage

  • Numbness or tingling in the hands and feet.
  • Feeling like you’re wearing a tight glove or sock.
  • Muscle weakness, especially in your arms or legs.
  • Regularly dropping objects that you’re holding.
  • Sharp pains in your hands, arms, legs, or feet.
  • A buzzing sensation that feels like a mild electrical shock.
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Which 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 sensory nerve?

A sensory nerve, (or afferent nerve) is a general anatomic term for a nerve which contains predominantly somatic afferent nerve fibers.

What are the special sensory nerves?

Special sensory (special visceral afferent).

Include special sensory neurons (e.g., smell, vision, taste, hearing, and equilibrium), mainly conducted by the olfactory, optic, and vestibulocochlear nerves (CNN I, II, and VIII, respectively) as well as by CN VII and CN X.

What are the 12 cranial nerves and their functions?

This article will explore the functions of the cranial nerves and provide a diagram.

  • Diagram.
  • I. Olfactory nerve. The olfactory nerve transmits information to the brain regarding a person’s sense of smell. …
  • II. Optic nerve. …
  • III. Oculomotor nerve. …
  • IV. Trochlear nerve. …
  • V. Trigeminal nerve. …
  • VI. Abducens nerve. …
  • VII. Facial nerve.


Which cranial nerve is responsible for swallowing?

The cranial nerves associated with the swallowing process are the trigeminal (V), facial (VII), glossopharyngeal (IX), vagus (X), accessory (XI) – usually not considered – and hypoglossal (XII).