Anatomy and Physiology l In Class Assignment-Chapter 13 Professor. Mark D. Grave
ID: 3524097 • Letter: A
Question
Anatomy and Physiology l In Class Assignment-Chapter 13 Professor. Mark D. Graves Question 1: State the 12 Cranial Nerves. Explain the function (Motor, Sensory, Both) of each nerve. Points earned 1pt Question 2: Explain the term "plexus. State the major plexuses of the body Points earned /0.5pt Question 3: Draw the 'dermatome. Points earned /0.5pt Question 4: State the components of a MONOSYNAPTIC reflex arc. Give an example if possible Points earned /1pt Question 5: Where and what do the following nerves serve/do? have been damaged? OR How would you know the following nerve A) Median, ulnar B) Radial C) Sciatic D) Femoral Points earned /1pt Question 6: How is gray and white matter different? Similar? Points earned /1ptExplanation / Answer
1.
The 12 cranial nerves and their functions are:
Cranial Nerve I is Olfactory and function is that it gives the sense of smell
Cranial Nerve II is Optic and function is Sight
Cranial Nerve III is Oculomotor and function is that it helps to move the eyelids and adjusts the lens and pupil.
Cranial Nerve IV is Trochlear and function is eye movement that is it helps to move the eyeballs for downward and upward eye movement
Cranial Nerve V is Trigeminal and function is facial sensations like Mastication, Pain, touch etc.
Cranial Nerve VI is Abducens and function is eyeball movement
Cranial Nerve VII is Facial and function is facial expressions, taste, saliva secretion etc.
Cranial Nerve VIII is Vestibulocochlear and function is Hearing and Equilibrium(Balance)
Cranial Nerve IX is Glossopharyngeal and function is swallowing, phonation of pharynx, gag reflex etc.
Cranial Nerve X is Vagus and function is the movement of Visceral muscles like Heart, Lungs, etc
Cranial Nerve XI is Spinal Accessory and function is the movement of head and shoulders, trapezius movement etc.
Cranial Nerve XII is Hypoglossal and function is swallowing and movement of the tongue for speech.
2.
Plexus or Nerve plexuses is the intermingling of different nerves in the form of a network.
Major nerve plexuses of the body are
(a) Cervical plexus with the main motor nerve being the Phrenic nerve.
(b) Brachial plexus with the main peripheral nerves being Axillary nerve, Radial nerve, Median nerve, Musculocutaneous nerve and Ulnar nerve
(c) Lumbar plexus with the main nerve being femoral nerve which is the largest nerve in this plexus.
(d) Sacral plexus with the main nerve being the Sciatic nerve which is the largest nerve found in the human body.