What is the 12 pairs of cranial nerves?

In higher vertebrates (reptiles, birds, mammals) there are 12 pairs of cranial nerves: olfactory (CN I), optic (CN II), oculomotor (CN III), trochlear (CN IV), trigeminal (CN V), abducent (or abducens; CN VI), facial (CN VII), vestibulocochlear (CN VIII), glossopharyngeal (CN IX), vagus (CN X), accessory (CN XI), and …

What are the 12 cranial nerve and their function?

The 12 cranial nerves extend from your brain and brain stem, responsible for helping you control different motor and sensory functions. Twelve cranial nerves extend from your brain and brain stem, responsible for helping you control different motor and sensory functions.

What are the 12 pairs of cranial nerves and their functions quizlet?

Terms in this set (12)

  • I Olfactory. Smell.
  • II – Optic. Vision.
  • III – Oculomotor. Eyelid & eyeball movement.
  • IV – Trochlear. Innervates superior oblique turns eye downward & laterally.
  • V – Trigeminal. Chewing. …
  • VI – Abducens. Turns eye laterally.
  • VII – Facial. Controls most facial expression. …
  • VIII – Vestibulocochlear (Auditory)

What are the twelve cranial nerves in order?

The twelve cranial nerves, in order from I to XII are: olfactory nerve, optic nerve, oculomotor nerve, trochlear nerve, trigeminal nerve, abducens nerve, facial nerve, vestibulocochlear nerve, glossopharengeal nerve, vagus nerve, spinal accessory nerve, and hypoglossal nerve.

How many pairs of cranial nerves are there?


The correct answer is 12. The nerves which arise from the brain are called the cranial nerves.

What is the acronym for the 12 cranial nerves?

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What is the function of abducens nerve?

The abducens nerve functions to innervate the ipsilateral lateral rectus muscle and partially innervate the contralateral medial rectus muscle (at the level of the nucleus – via the medial longitudinal fasciculus).

What is the third nerve?

The oculomotor nerve is the third cranial nerve (CN III). It allows movement of the eye muscles, constriction of the pupil, focusing the eyes and the position of the upper eyelid.

What are the cranial nerve?

The cranial nerves are a set of 12 paired nerves in the back of your brain. Cranial nerves send electrical signals between your brain, face, neck and torso. Your cranial nerves help you taste, smell, hear and feel sensations. They also help you make facial expressions, blink your eyes and move your tongue.

How many pairs of cranial nerves are there class 10?

12 pairs

The 12 pairs of cranial nerves are part of peripheral nervous system and are mostly concentred with head, neck and facial region of the body (vagus nerve X being the part of autonomous division serves as an exception).

How many pairs of nerves does a human have?

You have 31 pairs of spinal nerves. They’re grouped by the area of the spine that they’re associated with. Spinal nerves have both sensory and motor function.

How many pairs of nerves are there in the human body?

In humans there are 31 pairs: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal. Each pair connects the spinal cord with a specific region of the body. Near the spinal cord each spinal nerve branches into two roots.

How many nerves are in the foot?

There are over 7,000 nerve endings in each foot.

How many nerves are in your fingers?

These loops have branches leading off into the individual fingers. Each artery is accompanied by veins and nerves: In total, each finger is supplied by four bundles of nerves and blood vessels.

How many nerves are in your hand?

3 nerves

The hand is innervated by 3 nerves — the median, ulnar, and radial nerves — each of which has sensory and motor components. The muscles of the hand are divided into intrinsic and extrinsic groups.

How many muscles are in the human foot?

There are 29 muscles associated with the human foot. (10 foot/ankle and 19 intrinsic) Ten of these muscles originate outside of the foot itself but cross the ankle joint to act on the ankle joint and help position the foot.

What are finger bones called?


Phalanges. The 14 bones that are found in the fingers of each hand and also in the toes of each foot. Each finger has 3 phalanges (the distal, middle, and proximal); the thumb only has 2.

Do toes have knuckles?

The metatarsophalangeal joints (MTP joints), also informally known as toe knuckles, are the joints between the metatarsal bones of the foot and the proximal bones (proximal phalanges) of the toes.