PNS Final Exam - accumulative
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| The primary affferents within peripheral and spinal nerves that transmit tactile sensations are ______ -diameter fibers | LARGE
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| Which of the following receptors is (ARE) responsible for initialing the deep tendon reflex? | Muscle Spindle cells
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| The cell bodies of somatomotor neurons are located in the _____ horns of the spinal cord | Ventral
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| Which of the following describes the function of gamma motor neurons? | Innervates interafusal muscle fibers to set the sensitivity of the muscle spindle receptors
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| Which of the following NMJ disorders involves destruction of receptor sites on the muscle membrane? | Myasthenia gravis
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| The intermediolateral cell column (IML) contains the cell bodies of __________? | Pre-ganglionic neurons of the ANS
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| Compression of the cauda equina may cause loss of ______ innervation of the pelvic organs? | Parasympathetic
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| A warning sign of cauda equina syndrome is_____________ | pain, tingling, numbness in the S3, 4, and 5 dermatones
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| The ganglia of the paravertebral chain contain the cell bodies of __________ neurons | Sympathetic post ganglionic
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| Sympathetic innervation of the upper extremity exits from the ______ levels of the spinal cord | T2-8
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| Disc herniation at which of the following levels would most likely cause a C7 radiculopathy? | C6-7
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| A patient experiencing radicular pain, paresthesia, and numbness in the index and middle finger most likely has ____ radiculopathy | C7
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| Weakness of the wrist extensors results from radiculopathy, which spinal nerve level is most likely compromised? | C6
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| The main spinal nerve innervation of the triceps DTR is considered to be the _____ spinal nerve? | C7
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| The brachial plexus is formed by the ____ primary division of the ______ spinal nerves | Anterior , C5-T1
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| The brachial plexus is subject to compression, as it passes between the ____________ | All the above
Ant and Med Scaene muscles, Clavicle and 1st rib, AND pec minor and anterior chest wall
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| The long thracic nerve arises from the __________ | C5-C7 spinal nerves
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| Which of the following peripheral nerves are terminal branches of the posterior cord of the brachial plexus? | Axillary and radial
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| Which of the following peripheral nerves is formed from the joining of contributions from both the lateral and medial cords? | Median
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| Which of the following is the major peripheral nerve innervating sensation and muscle in the posterior aspect of the upper extremity? | Radial
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| Which of the following best describes the distribution of the motor and sensory function of the musculocutaneous nerve? | Innervates muscles in the arm and sensation of the forearm
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| The median nerve transmits sensation from the _________- | Hand only.
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| The median nerve innervates muscle in the ___________- | forearm and hand only
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| Which of the following muscles is innervated by the long thoracic nerve? | Ant. Serratus
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| Which of the following peripheral nerves may be compressed in the triangular interval? | Radial
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| Which peripheral nerve is subject to compression in the supinator muscle? | Radial
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| Which of the following peripheral nerves innervates the forearm pronator muscles? | Median
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| Weakness is noted when your patient attempts to flex their forearm when it is semi-pronated/semi-supinated position, but not in the fully supinated position. Which peripheral nerve is most likely compromised? | Radial
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| Weakness of the hypothenar muscles would result from injury of which of the following peripheral nerves? | Ulnar
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| When your patient's thenar muscles and flexor carpi radialis muscle are weak, the nerve leasion would more likely be in the: | Pronator teres muscle
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| The iliohypograstric, ilioinguinal and genitofemoral nerves are branches of the _____ plexus | Lumbar
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| The lateral femoral cutaneous nerve is a branch of the ______ plexus | Lumbar
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| The posterior femoral cutaneous nerve is a branch of the ________ plexus | Sacral
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| Which of the following peripheral nerves are formed by contributions from the L2-4 spinal nerves? | Femoral and Tibial
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| Which is true regarding the obtorator nerve? | Innervates muscles and sensation in the thigh
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| The condition "meralgia patesthetica" involves compression of the ______ nerve | Lateral femoral cutaneous nerve
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| Which of the folllowing peripheral nerves would most likely be subject to potential compression by the piriformis muscle? | Sciatic
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| Which of the following comes from the cervical plexus? | SupraCLAVICULAR nerve
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| The spinal nerve origin of the phrenic nerve is? | C3,4,5
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| Which of the following are cutaneous branches of the cervical plexus? | ALL OF THE ABOVE
greater auricular, transverse cervical, and lesser occipital
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| The infrahyoid muscles are innervated by: | Branches of the ansa cervicalis
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| The descendens hypoglossi and descendens cervicalis are: | Portions of the ansa cervicalis
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| A patient presents with radicular pain and rash that cirlces around left side of their torsi by umbilicus. Which spinal nerve is most likely compromised? | T10
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| The intercostal nerves come from the _______ primary rami of thoracic spinal nerves | anterior
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| Herpes zoster most commonly affects ____ spinal nerves | Thoracic
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| The sympathetic innervation of the lower extremity originates from the ____ spinal cord levels? | Lower thoracic and Upper lumbar
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| Sympathetic innervation of the head and face would cause the pupils to become abnormally ____________ | constricted
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| The celiac ganglion is: | A ganglion in front of the spinal column in the abdominal cavity
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| The greater, lesser and least splanchnic nerves contain axons of __________ sympathetic nerurons | Preganglionic
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| Which of the following CN contain parasympathetic fibers as they exit the brainstem? | CN 3, 7, 9 and 10
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| Which of the following visual field deficits would most likely result from a lesion of the netro-chiasmal portion of the visual pathway on the right? | Right homonymous hemianopia
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| loss of facial sensation would most likely occur due to CN ______ lesion | 5
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| which of the following pupillary reflex abnormalities would most likely result from a right CN 3 lesion? | Light shined in R eye: no direct reflex observed, but normal indict reflex observed. Light shined in L eye: normal direct reflex observed, no indirect reflex observed.
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| Which of the following pairs of muscles are primarily involved in looking up to the left? | Left superior rectus and right inferior oblique
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| When your patient attempts to look down toward the right, movement of the left eye is noted to be weak. leasion of which of the following brainstem nuclei would most likely be responsible for the patients left eye weakness? | Right trochlear nucleus
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| In which of the following directions of gaze would a patient with a left abducens nerve injury most likey experience diplopia? | Looking toward the left
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| The afferent limb of the corneal reflex is CN ______ | 5
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| The efferent limb of the corneal reflex is CN _______- | 7
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| Which of the following thalmic nuclei is the AUDITORY relay nucleus? | Medial Geniculate
M = muscic
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| Which of the following thalmic nuclei is the VISUAL relay nucleus? | Lateral geniculate
L = light
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| Drooping of the upper eyelid would most likely result from lesion of which of the following cranial nerves? | CN 3
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| Which of the following is a function of the Edinger-Westphal nucleus? | Movements of the eye
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| When herpes zoster affects the trigeminal nerve, the _____ distribution is/are most commonly affected? | V1
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| Which of the following CN innervates both salivation and lacrimation? | CN 7
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| When a patient has facial weakness involving entire RIGHT side of their face, they would most likely have a lesion involving which of the following? | Left facial nerve
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| When the tongue is protruded it will deviate ____ the side of CN XII lesion | TOWARD
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| The uvula will diviate _____ the side of CN XII lesion | AWAY FROM
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| Function of CN I: | Olfaction
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| Function of CN II | Vision
AFFERENT limb of light reflex
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| Function of CN III: | Extraocular movement (inf oblique, inf/med/sup rectus)
Elevation of the upper eyelid (levator palpebra)
Parasympathetics to the pupilloconstrictors and ciliary muscles of the lens for near vision
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| Function of CN IV: | Extraocular movement (superior oblique)
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| Function of CN V: | Facial sensation (all divisions)
muscles of mastication (V3)
corneal reflex (AFFERENT limb)
Jaw jerk reflex
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| Function of CN VI: | extraocular movement (lateral rectus)
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| Function of CN VII: | Muscles of facial expression
taste from ANTERIOR 2/3 of tongue
Corneal reflex (EFFERENT limb)
Parasympathetics to LACRIMAL glands, sublingual and submandibular salivary glands
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| what CN has the AFFERENT LIMB of the light reflex? | CN II (2)
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| What CN has the AFFERENT limb of the corneal reflex? | CN V (5)
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| What CN has the EFFERENT limb of the corneal reflex? | CN VII (7)
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| What CN has the AFFERENT limb of the carotid sinus reflex? | CN IX (9)
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| What CN has the EFFERENT limb of the carotid sinus reflex? | CN X (10)
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| Function of CN VIII: | Hearing
vestibular (balance and coordination of head and eyes)
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| Function of CN IX: | Taste posterior 1/3 of tongue
carotid sinus reflex (AFFERENT limb)
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| Bell's Palsy? | Facial weakness on the entire side IPSILATERALLY,
Involves the FACIAL nerve
Involves LMN
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| Function of CN X: | Soft plate
larynx
parasympathetic innervation to the heart, lungs most of the GI (not distal)
Carotid Sinus Reflex (EFFERENT limb)
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| Function of CN XI: | SCM and upper traps
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| Function of CN XII: | Intrinsic muscles of the tongue
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| Where does the Axillary nerve originate from? | The posterior cord
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| The axillary nerve innervates what muscles? | Teres minor and Deltoid
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| The axillary nerve provides sensory to what part of the arm? | The lateral proximal arm
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| The musculocutaneous nerve originates from? | The LATERAL cord
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| The musculocutaneous nerve MOTOR innervates what muscles? | Corocobrachialis, biceps bracii, brachialis
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| The musculocutaneous nerve SERNSORY innervates what part of the arm? | The lateral forearm
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| The Radial nerve originates from? | The POSTERIOR cord
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| The radial nerve MOTOR innervates what muscles? | The Triceps, Brachioradialis, and many other posterior arm muscles (extensors mm)
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| The median nerve originates from what? | The lateral AND medial cords
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| The median nerve innervates what muscles (motor)? | Pronators (teres and quardratus), wrist flexors, finger flexors, THENAR muscles, lumbricals, "pollicis" muscles
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