Neuro (lecture/trans) Flashcards
Abnormal perception of pain from a normally nonpainful mechanical or thermal stimulus. Delay in perception and of after sensation
Allodynia
Mainly spontaneous abnormal sensation that is mot unpleasant; usually described as “pins and needles”
Paresthesia
It is measured through position sense and vibration sense
Proprioception
In patients with immature brain or deep coma, meningeal signs are all positive. True or False
False. We will not be able to elicit the meningeal irritation signs
If the patient cannot raise his hand but cam do side to side movement of the extremities
- Active movement with gravity eliminated
Character of the alteration of muscle tone in extra pyramidal syndromes
Plastic, equal throughout passive movement (rigidity) or intermittent (cogwheel)
Superficial abdominal reflex direction of the stimuli
Towards the umbilicus
Seen in loss of position sense in the legs from polyneuropathy or posterior column damage.
Sensory ataxia
Gait is staggering and unsteady,
with feet wide apart and
exaggerated difficulty on turns. Patients cannot stand steadily with feet together, whether eyes
are open or closed.
Other signs are
present such as dysmetria,
nystagmus, and intention
tremor.
Cerebellar ataxia
Modulates equilibration and the orientation of head and eyes
• Has connections with Vestibular Nuclei located in the Pons and Medulla
Flocculonodular lobe
Left Frontal Lesion
• Instruction:
1. Verbally instruct the patient to do the different
tongue movements 2. Ask the patient to act as if blowing out a match or
sucking a straw 3. If verbal instruction fails, try miming
• If the person cannot do the action even if you already
showed him how
BUCCO-FACIAL APRAXIA
Left Parietal Lesion
• Instruction:
1. Ask the patient to demonstrate sequential acts → Example: illustrate how to cook rice
Ideomotor apraxia
Right Parietal Lesions
• Instruction: 1. Draw geometric figures
Constructional apraxia
Dysfunction of the Medial Frontal Cortex
• One reason why a patient with no hemiparesis will still
stay bed-bound → patient’s brain forgot how to walk
Gait apraxia
Perception of odor in absence
• Example:
HALLUCINATORY EXPERIENCE
• Causes:
a. Medial Temporal Lobe Seizure →
Uncinate Fit – abnormal neuronal discharge is coming from the Uncus of the Temporal Lobe
Phantosmia
The preferential gaze and the hemiparesis will both be contralateral to the lesion
True or False
True
Pontine gaze center, ipsilateral or contralateral
Ipsilateral
If you have an infarct on the Right Pons, the
Preferential Gaze is on the
Left
Ask the patient to say “ah” or to yawn as you watch the movements of the soft palate and the pharynx. What CN test?
CN IX, GLOSSOPHARYNGEAL NERVE
In a patient experiencing weakness on the right face, right arm, and right leg, lesion will be on the
Left corticospinal tract
Lesion is below the brainstem, weakness is what side
Ipsilateral to the lesion
Manifest as the lower motor neuron type of lesion
Lesions at Ventral Gray Horn, Ventral Root, Spinal Nerves, Plexuses, Peripheral Nerves, NMJ, Muscle (if it is already involving the parts of the PNS + the Gray Matter of the Spinal Cord)
will manifest as the UPPER MOTOR NEURON type of weakness
If the lesion is located anywhere between the
Cerebral Hemispheres to the Lateral White Matter of the Spinal Cord
increased muscle tone, hyperreflexia
upper motor neuron signs
decreased muscle tone, hyporeflexia, fasciculations and atrophy
lower motor neuron signs
mediate voluntary movement and integrate skilled, complicated, or delicate movements by stimulating selected muscular actions and inhibiting others.
Corticospinal (pyramidal) tract.
synapse on lower motor neurons in the spinal cord which directly mediate movement. Damage causes weakness.
the corticospinal tract system
helps to maintain normal muscle tone and to control body movements, especially gross automatic movements such as walking.
Basal ganglia system.
Damage can cause rigidity, slowness of movement (bradykinesia), involuntary movements, and/or disturbances in posture and gait.
to the basal ganglia
receives both sensory and motor input and coordinates motor activity, maintains equilibrium, and helps to control posture.
Cerebellar system.
also helps coordinate eye movements and speech, so other signs like nystagmus or dysarthria may be seen.
cerebellum
Damage can impair coordination (called ataxia), gait, equilibrium, and decrease muscle tone
cerebellum
True or False
Disease of the basal ganglia system or cerebellar system cause paralysis
False. does not cause paralysis but can be disabling.
Origin area of corticospinal tract
Frontal Lobe / Area 4 /
Prefrontal Gryus
MOST COMMON SITE of
INTRACRANIAL HEMORRHAGES secondary to
Hypertension
Basal ganglia
Atrophy slight and due to disuse
• Comes AFTER the
weakness
UMN (Supranuclear) paralysis
Atrophy pronounced; up to 70% of total bulk
• May be present BEFORE
the weakness
LMN (Nuclear- Infranuclear) Paralysis
Hallmark of LMN (Nuclear- Infranuclear) Paralysis
Fasciculations / Rippling of Muscles
Spasticity
hyperactivity of the tendon reflexes and extensor plantar reflex (Babinski Sign)
UMN (Supranuclear) paralysis
Flaccidity and hypotonia of affected muscles with loss of tendon reflexes.
Plantar reflex, if present, is of normal flexor type
LMN (Nuclear- Infranuclear) Paralysis
Individual muscles may be
affected
LMN (Nuclear- Infranuclear) Paralysis
Pathognomonic Sign for a lesion anywhere in the Corticospinal Tract
+) Babinski Sign
Active movement done to evaluate the
strength of proximal leg muscles
Hopping in place, rising from sitting position, or
stepping up on stool
Excessive flexion of hips and knee with every step
Steppage Gait
Weakness of hip muscles cause drop of hip and
trunk tilting to the side OPPOSITE foot placement
Waddling Gait
fall to SIDE OF LESION
o Poor balance
o Ask which side the patient is veering too → that side is IPSILATERAL to the lesion
Vestibular ataxia
Small, shuffling steps or festinating
→ strides become quicker and
shorter than normal (hurrying)
Parkinsonian gait
If the Hemiplegia weakness of the face is on the SAME SIDE of the arm and leg weakness → lesion can be localized to
CEREBRAL
HEMISPHERE
If the hemiplegia weakness of the face is
opposite to the Hemiparesis → lesion can be localized to
Brainstem