Nerves Flashcards
What are the roots of the radial nerve
Motor and Sensory Innervation
Patterns of damage?
C5-T1 Motor- triceps LOSS OF ELBOW EXTENSION Anconeus Brachioradialis Extensor carpi radialis SENSORY SEE PIC RAIDAL INJURY CAUSES WRIST DROP
What are the roots of the radial nerve
Motor and Sensory Innervation
Patterns of damage?
C5-T1 Motor- triceps LOSS OF ELBOW EXTENSION Anconeus Brachioradialis Extensor carpi radialis SENSORY SEE PIC RAIDAL INJURY CAUSES WRIST DROP
What are the roots of the radial nerve
Motor and Sensory Innervation
Patterns of damage?
C5-T1 Motor- triceps LOSS OF ELBOW EXTENSION Anconeus Brachioradialis Extensor carpi radialis SENSORY SEE PIC RAIDAL INJURY CAUSES WRIST DROP
WHat does the dorsal column consist of?
WHat does it carry?
What carries information from the lower limb?
What carries information from the upper limb?
Describe the pathway
Dorsal column= Cuneate and Gracile
Carries fine touch and proprioception
Lower limb fine touch and proprioception- Gracile fasiculus
Upper limb fine touch and proprioception- Cuneate fasiculus
Both these fasiculi travel to the caudate and gracile nucleus
The tracts then decusate (cross over) to the medial leminiscus
They are then carried up the ventral posterolateral nucleus to the posterior central gyrus
Spinothalamic tract
what does it carry?
What is its pathway?
Spinothalamic- Pain crude touch and temperature
Spinothalamic tract enters the spinal cord and lissaeurs fasiculus
Ascends/descends one or two levels
this then synapses at dorsal horn of the grey matter
this then decussates at the anterior white comissure to the spinothalamic fasiculus
this then synapses at the thalamus which takes it to the posterior central gyrus
Stroke in the anterior cerebral artery
contralateral hemiparesis and sensory loss, lower extremity
Stroke in the middle cerebral artery
contralateral hemiparesis and sensory loss, upper extremity
contralateral homonymous hemianopia
aphasia
Stroke in the posterior cerebral artery?
Contralateral homonymous hemianopia
with macular sparing
visual agnosia
Stroke in the branches of posterior cerebral artery that supply the midbrain? WEBERS SYNDROME
Ipsilateral CN3 palsy (Ptosis, down and out and dilation)
Contralateral weakness of upper and lower extremity
What is wallenberg/lateral medullary syndrome?
Ipsilateral face pain and temperature loss
Contralateral: limb/torso pain and temperature loss
Ataxia, nystagmus
What is lateral pontine syndrome
Anterior inferior cerebellar artery (lateral pontine syndrome)
Symptoms are similar to Wallenberg’s (see above), but:
Ipsilateral: facial paralysis and deafness
Blockage of retinal/opthalmic artery
amaurosis fugax
blockage of the basilar artery
locked in syndrome
What is a lacunar stroke
purely sensory ‘
present with either isolated hemiparesis, hemisensory loss or hemiparesis with limb ataxia
strong association with hypertension
common sites include the basal ganglia, thalamus and internal capsule
