Neurological Exam Flashcards
What are the components of a NEUROLOGICAL EXAMINATION
Mental State Speech Cranial Nerves Examination of Limbs & Trunk: - posture - wasting - tone - power - reflexes - sensation - coordination & gait
BICEPS JERK
Major segmental innervation & peripheral nerve
C5(6)
Musculocutaneous nerve
SUPINATOR JERK
Major segmental innervation & peripheral nerve
C5/6
Radial nerve
TRICEPS JERK
Major segmental innervation & peripheral nerve
C7(8)
Radial nerve
FLEXOR FINGER JERK
Major segmental innervation & peripheral nerve
C6-T1
Median and Ulnar n.
KNEE JERK
Major segmental innervation & peripheral nerve
L3/4
Femoral
ANKLE JERK
Major segmental innervation & peripheral nerve
S1(2)
Medial popliteal and sciatic n.
TRAPEZIUS
Nerve and major root supply of muscle
C3/4
Spinal accessory n.
RHOMBOIDS
Nerve and major root supply of muscle
C4/5
Brachial plexus
SERRATUS ANTERIOR
Nerve and major root supply of muscle
C5 C6 C7
Brachial plexus
PECTORALIS MAJOR
Nerve and major root supply of muscle
Clavicular C5/6
Sternal C6, C7, C8
Brachial plexus
SUPRASPINATUS
Nerve and major root supply of muscle
C5/6
Brachial plexus
INFRASPINATUS
Nerve and major root supply of muscle
C5/6
Brachial plexus
LATISSIMUS DORSI
Nerve and major root supply of muscle
C6, C7, C8
Brachial plexus
TERES MAJOR
Nerve and major root supply of muscle
C5, C6, C7
Brachial plexus
DELTOID
Nerve and major root supply of muscle
C5/6
Axillary n.
BICEPS
Nerve and major root supply of muscle
C5/6
Musculocutaneous n.
BRACHIALIS
Nerve and major root supply of muscle
C5/6
Musculocutaneous n.
TRICEPS
Nerve and major root supply of muscle
Long head/lateral head/medial head
C6, C7, C8
Radial n.
BRACHIORADIALIS
Nerve and major root supply of muscle
C5/6
Radial n.
EXTENSOR CARPI RADIALIS LONGUS
Nerve and major root supply of muscle
C5/6
Radial n.
SUPINATOR
Nerve and major root supply of muscle
C6/7
Posterior interosseous n.
EXTENSOR CARPI ULNARIS
Nerve and major root supply of muscle
C7/8
Posterior interosseous n.
FLEXOR DIGITORUM SUPERFICIALIS
Nerve and major root supply of muscle
C7, C8, T1
Posterior interosseous n.
ABDUCTOR POLLICIS BREVIS
Nerve and major root supply of muscle
C7/8
Posterior interossesous n.
EXTENSOR POLLICIS BREVIS
Nerve and major root supply of muscle
C7/8
Posterior interossesous n.
EXTENSOR INDICIS
Nerve and major root supply of muscle
C7/8
Posterior interossesous n.
PRONATOR TERES
Nerve and major root supply of muscle
C6/7
Median n.
FLEXOR CARPI RADIALIS
Nerve and major root supply of muscle
C6/7
Median n.
FLEXOR DIGITORUM SUPERFICIALIS
Nerve and major root supply of muscle
C6, C7, C8
Median n.
ABDUCTOR POLLICIS BREVIS
Nerve and major root supply of muscle
C8, T1
Median n.
FLEXOR POLLICIS BREVIS
Nerve and major root supply of muscle
C8, T1
Median n.
OPPONENS POLLICIS
Nerve and major root supply of muscle
C8, T1
Median n.
LUMBRICALS I and II
Nerve and major root supply of muscle
C8, T1
Median n.
FLEXOR DIGITORUM PROFUNDUS I and II
Nerve and major root supply of muscle
C7/8
Anterior interosseous n.
FLEXOR POLLICIS LONGUS
Nerve and major root supply of muscle
C7/8
Anterior interosseous n.
FLEXOR CARPI ULNARIS
Nerve and major root supply of muscle
C7, C8, T1
Ulnar n.
FLEXOR DIGITORUM PROFUNDUS III and IV
Nerve and major root supply of muscle
C7/8
Ulnar n.
HYPOTHENAR MUSCLES
Nerve and major root supply of muscle
C8, T1
Ulnar n.
ADDUCTOR POLLICIS
Nerve and major root supply of muscle
C8, T1
Ulnar n.
FLEXOR POLLICIS BREVIS
Nerve and major root supply of muscle
C8, T1
Ulnar n.
PALMAR INTEROSSEI
Nerve and major root supply of muscle
C8, T1
Ulnar n.
DORSAL INTEROSSEI
Nerve and major root supply of muscle
C8, T1
Ulnar n.
LUMBRICALS III and IV
Nerve and major root supply of muscle
C8, T1
Ulnar n.
ILIOPSOAS
Nerve and major root supply of muscle
L1, L2, L3
Femoral n.
QUADRICEPS FEMORIS
Nerve and major root supply of muscle
L1, L2, L3
Femoral n.
Recuts femoris
Vastus medius
Vastus lateralis
Vastus intermedius
ADDUCTOR LONGUS
Nerve and major root supply of muscle
L2, L3, L4
Obturator n.
ADDUCTOR MAGNUS
Nerve and major root supply of muscle
L2, L3, L4
Obturator n.
GLUTEUS MEDIUS and MINIMUS
Nerve and major root supply of muscle
L4, L5, S1
Superior gluteal n.
TENSOR FASCIA LATAE
Nerve and major root supply of muscle
L4, L5, S1
Superior gluteal n.
GLUTEUS MAXIMUS
Nerve and major root supply of muscle
L5, S1, S2
Inferior gluteal n.
SEMITENDINOSUS
Nerve and major root supply of muscle
L5, S1, S2
Sciatic and tibial n.
BICEPS FEMORIS
Nerve and major root supply of muscle
L5, S1, S2
Sciatic and tibial n.
SEMIMEMBRANOSUS
Nerve and major root supply of muscle
L5, S1, S2
Sciatic and tibial n.
GASTROCNEMIUS and SOLEUS
Nerve and major root supply of muscle
S1/2
Sciatic and tibial n.
TIBIALIS POSTERIOR
Nerve and major root supply of muscle
L4/5
Sciatic and tibial n.
FLEXOR DIGITORUM LONGUS
Nerve and major root supply of muscle
L5, S1, S2
Sciatic and tibial n.
FLEXOR HALLUCIS LONGUS
Nerve and major root supply of muscle
L5, S1, S2
Sciatic and tibial n.
SMALL MUSCLES OF FOOT
Nerve and major root supply of muscle
S1/2
Sciatic and tibial n.
TIBIALIS ANTERIOR
Nerve and major root supply of muscle
L4/5
Sciatic and common peroneal n.
EXTENSOR DIGITORUM LONGUS
Nerve and major root supply of muscle
L5, S1
Sciatic and common peroneal n.
EXTENSOR HALLUCIS LONGUS
Nerve and major root supply of muscle
L5, S1
Sciatic and common peroneal n.
EXTENSOR DIGITORUM BREVIS
Nerve and major root supply of muscle
L5, S1
Sciatic and common peroneal n.
PERONEUS BREVIS
Nerve and major root supply of muscle
L5, S1
Sciatic and common peroneal n.
PERONEUS LONGUS
Nerve and major root supply of muscle
L5, S1
Sciatic and common peroneal n.
DYSARTHRIA
Dysarthria is due to impaired coordination of the lips, palate, tongue and larynx and may result from extrapyramidal, brainstem or cerebellar le- sions. The volume and content of the speech will be normal but the enunciation will be distorted
SPASTIC DYSARTHRIA
This is due to bilateral upper motor neurone disease due to pseudobulbar palsy, motor neurone disease or brainstem tumours.
ATAXIC DYSARTHRIA
This is due to incoordination of the muscles of speech; the words are often staccato or scanning and the rhythm is jerky. This type of dysarthria is seen in cerebellopontine angle tumours, cerebellar lesions, multiple sclerosis and phenytoin toxicity.
RIGID DYSARTHRIA
This is characteristic of Parkinson’s disease. In severe cases the phenomenon of palilalia is seen.
EXPRESSIVE DYSPHAGIA
This is due to a lesion affecting either Broca’s area in the lower part of the precentral gyrus or the left posterior temporoparietal region. If the latter region is affected the patient may have a nominal dysphasia, in which the ability to name objects is lost but the ability to speak is retained.
RECEPTIVE DYSPHAGIA
This results from lesions in Wernicke’s area, which is the posterior part of the superior temporal gyrus and the adjacent pari- etal lobe.
ALEXIA
Inability to understand written speech.
Alexia with agraphia (inability to write) is due to a lesion in the left angular gyrus often accompanied by nominal dysphasia, acalculia, hemianopia and visual agnosia
GERTSMANN SYNDROME
consists of finger agnosia for both the patient’s own finger and the examiner’s finger, acalculia, right/left disorientation and agraphia without alexia. It is found in lesions of the dominant hemisphere in the region of the angular gyrus.
Common causes of ANOSMIA
Olfactory nerve lesions from head injury, tumours involving the floor of the anterior cranial fossa
- olfactory groove meningiomas
Examination of OLFACTORY NERVE
It is important to use non-irritant substances
when testing olfaction, as irritating
compounds (e.g. ammonia) will cause irritation
of the nasal mucosa. The stimulus is then perceived
by the general sensory fibres of the trigeminal
nerve.
Examination of OPTIC NERVE
Visual acuity
Colour vision
Fundoscopy
Pupillary light reflex
Foraml assessment of VISUAL FIELDS
Bjerrum screen
Goldmann perimeter
Pattern of visual field loss and anatomical site of lesion
Total visual loss - optic nerve lesion
Altitudinous hemianopia - partial lesion of the optic nerve due to trauma or vascular accident
Homonymous hemianopia - lesion of the optic tract, radiation or calcarine cortex
Bitemporal hemianopia - optic chiasm lesion e.g. pituitary tumour, craniopharyngioma or suprasellar meningioma
FUNDOSCOPIC EXAMINATION
Optic disc
Vessels
Retina
A pale optic disc is due to optic atrophy which
may be either primary, as a result of an optic
nerve lesion caused by compression or demyelination,
or consecutive, which follows severe
swelling of the disc.
Papilloedema is due to raised intracranial pressure and is evident by:
• blurring of the disc margins
• filling in of the optic cup
• swelling and engorgement of retinal veins,
with loss of normal pulsation of the veins
• haemorrhages around the disc margin (if severe)
Examination of OCCULOMOTOR, TROCHLEAR and ABDUCENS nerves
Position of Eyelid
Pupils - size, shape, equality: direct/consensual
Extraocular movements
PTOSIS
Due to paralysis of the levator palpebrae
superioris as a result of a 3rd cranial nerve lesion
or due to weakness of the tarsal muscle due to a
sympathetic lesion (Horner’s syndrome).
MIOSIS
Unilateral constricted pupil oftenindicates a lesion in the sympathetic supply tothe pupillary dilator muscle.
HORNER’S SYNDROME
Horner’s syndrome, in its complete state, consists
of miosis, ptosis, enophthalmos and dryness
and warmth of half of the face.
Due to a lesion of the sympathetic supply such as results from an intracavernous carotid artery aneurysm, or a Pancoast’s tumour of the apex of the lung.
MYRDRIASIS
Dilated pupil secondary to paralysis of the parasympathetic fibres originating from the Edinger-Westphalia nucleus in the midbrain.
- Seen in CN III palsy
Causes: enlarging PCA aneurysm, tentorial herniation from raised ICP with herniated uncus of the temporal lobe compressing the CN III
ARGYLL-ROBERTSON pupil
Small, irregular pupil not reacting to light
Reacting to accommodation but responding poorly to mydriatics
Usually caused by syphilis.
HOLMES-ADIE pupil
Myotopic pupil
Usually occurs in young woman and presents as unilateral dilatation of one pupil with failure to react to light.
In the complete syndrome the knee and ankle jerks are absent.
LATERAL RECTUS
CN VI moves the eye horizontally outwards.
MEDIAL RECTUS
CN III moves the eye horizontally inwards.
SUPERIOR RECTUS
CN III elevatest eh eye when it is turned outwards.
INFERIOR OBLIQUE
CN III elevates the eye when it is turned inwards.
INFERIOR RECTUS
CN III depresses the eye when it is turned outwards.
SUPERIOR OBLIQUE
CN IV derpesses the eye when it is turned inwards
Impaired CONJUGATE OCCULAR EYE MOVEMENT
The centre control of conjugate lateral gaze is situated in the posterior frontal lobe, with input from the occipital lobe.
Final common pathway for controlling conjugate movement is the brainstem - median longitudinal bundle
Frontal lobe lesion causes contralateral paralysis of conjugate gaze (i.e. eyes deviated towards lesion)
Lesion of brainstem causes ipsilateral paralysis of conjugate gaze (i.e. eyes deviated away from lesion)