Neurology - Clinical Neurophysiology Flashcards
the median nerve comprises which 2 cords
a.lateral and medial
b.lateral and posterior
c.medial and posterior
a.lateral and medial
which cord supplies sensory fibres to the thenar eminences , thumb, index and middle fingers
a.lateral
b.medial
c.posterior
a.lateral
whoch cord provides motor fibres to the median muscles of the forearm
a,lateral
b,medial
a.lateral
which fibres make up the medial cord
a.c6-c7
b.c7-c8
c.c8-t1
dt1-t2
c.c8-t1
which fibres make up the lateral cord
a.c6-c7
b.c7-c8
c.c8-t1
d. t1-t2
a.c6-c7
which cord gives sensory fibres to the lateral 1/3 of the ring finger
a.lateral
b.medial
c.posterior
b.medial
which cord gives motor fibres to median muscles of distal forearm and hand
a. lateral
b.medial
c.psoterior
b.medial
mostly motor
patient with diabetes mellitus and pins and needles in median nerve distribution worse on wakening and waking them from sleep what does this indicate
a.carpal tunnel syndrome
b.anterior interosseus neuropathy
c.unlar nerve lesion
d.wrist drop
e.c8-t1 cervical radiculopathy
a.carpal tunnel syndrome
which endocrine condition can present with complaints of pins and needles in the hands
a.cushings
b.addisons
c.conns
d.graves
e.hashimotos
f.acromegaly
f.acromegaly
or hypothyroidism
why is the palm spared sometimes in carpal tunnel syndrome
palmar cutaneous branches before carpal tunnel
an increase in time taken for the signal to reach the electrodes in a nerve conduction study indicates what
a. damage to the myelin
b.axonal loss
a. damage to the myelin
an decrease in amplitude in a nerve conduction study indicates what
a. damage to the myelin
b.axonal loss
b.axonal loss
which hand is more commonly affected in carpal tunnel syndrome
dominant
which test is more sensitive
a.tinnels
b.phalens
b.phalens
what muscle should be assessed if there is thenar wasting and weakness of thumb abduction and opposition
a.flexor carpi ulnaris
b.flexor policis longus
c.brachioradialis
b.flexor policis longus
differentials for carpal tunnel syndrome
c6-c7 root lesion
brachial plexus lesion
proximal median nerve lesion
PN , MND
reduced reflexes and reduced power in combination with reduced sensation in the palm and forearm indicates what\
a.proximal median nerve lesion
b.anterior interosseus neuropathy
c.brachial plexus lesion
d.wrist drop
e.c6-c7 nerve lesion
e.c6-c7 nerve lesion
which nerve supplies motor fibres to flexor pollicis longus , flexor digitorum profundus and pronator quadratus
a.median
b.anterior interosseus
c.posterior interosseus
d.ulnar
b.anterior interosseus
inability to light a lighter, take a photo on a camera and hold a cup but NO sensory symtpoms is indicative of damage of which nerve
a.median
b.anterior interosseus
c.posterior interosseus
d.ulnar
b.anterior interosseus
fracture of what can lead to anterior interosseus neuropathy
a.radial groove of humerus
b.mid shaft of radius
c.mid shaft of ulna
d.olecranon
b.mid shaft of radius
what nerve roots is the ulnar nerve derived from
a.c6-c7
b.c7-c8
c.c8-t1
d. t1-t2
c.c8-t1
the ulnar nerve travels under the tendinous arch of 2 heads of which muscle
a.flexor policis longus
b.flexor carpi ulnaris
c.abductor policis brevis
d. brachioradialis
b.flexor carpi ulnaris
which branches leave the ulnar nerve before the cubital tunnel at elbow
dorsal cutaneous
palmar cutaneous
which branches leave the ulnar nerve before the cubital tunnel at elbow
dorsal cutaneous
palmar cutaneous
in ulnar neuropathy which symptoms dominate
a.sensory
b.motor
b.motor
wartenbergs signs seen in ulnar neuropathy
little finger gets caught when hand put into pocket
abducted 5th finger due to weakness of 3rd palmar interosseus muscle
benediction posture
ring and little fingers clawed
thumb slightly abducted
if sensory symptoms in ulnar neuropathy are limited to the MCP the nerve compression is most liekly to be found at which location
a.wrist
b.elbow
c.lower brachial plexus
a.wrist
if sensory symptoms in ulnar neuropathy are limited to the MCP and palmar only the nerve compression is most liekly to be found at which location
a.wrist
b.elbow
c.lower brachial plexus
b.elbow
below point of dorsal cutaneous branching and above the palmar branch
dorsal cutaneous - this branch still supplies back of hand so that is normal
if sensory symptoms in ulnar neuropathy extend to the mcp, palmar and dorsal ulnar nerve distributions the nerve compression is most liekly to be found at which location
a.wrist
b.elbow
c.lower brachial plexus
c.lower brachial plexus
sensory disturbance in the forearm and weakness involving abductor policis brevis indicates what
a.proximal median nerve lesion
b.anterior interosseus neuropathy
c.brachial plexus lesion
d.wrist drop
e.c8-t1 radiculopathy
e.c8-t1 radiculopathy
patient only has weakness, wasting and fasciculation in limbs no sensory symptoms
ALS
in which condition is there bilateral wasting especially in lower limbs and is associated with a PMH of diabetes mellitus
a. peripehral neuropathy
b.anterior interosseus neuropathy
c.brachial plexus lesion
d.wrist drop
e.c8-t1 radiculopathy
a. peripehral neuropathy
where is the radiculopathy found in wrist drop
a.c6-c7
b.c7-c8
c.c8-t1
b.c7-c8
wrist drop without sensory disturbance indicates a damage where
a.axillary nerve
b.posterior interosseus nerve
c.superficial radial
b.posterior interosseus nerve
what muscle should be checked next in wirst drop (posterior interosseus nerve) with sensory disturbance (superficial radial nerve )
a.fcp
b.apb
c.fcu
d.brachioradialis
d.brachioradialis
which nerve supplies sensory to the arm
a.ulnar nerve
b.radial nerve
c.anterior interosseus
d.axillary nerve
e.superficial radial
e.superficial radial
wrist drop, weak suppination is indicative of what
a. peripehral neuropathy
b.anterior interosseus neuropathy
c.brachial plexus lesion
d.’saturday night palsy’
e.c8-t1 radiculopathy
d.’saturday night palsy’
fracture of which bone can cause wrist drop
a.ulnar
b.radius
c.humerus
c.humerus
in a brachial plexus lesion which other muscles should be weak excluding hand muscles
a.deltoid and latisimus dorsi
b.deltoid and pec minor
c.supraspinatous and trapezius
a.deltoid and latisimus dorsi
