Scanning speech is a type of ataxic dysarthria in which spoken words are broken up into separate syllables, often separated by a noticeable pause, and spoken with varying force. The sentence "Walking is good exercise", for example, might be pronounced as "Walk (pause) ing is good ex (pause) er (pause) cise". Additionally, stress may be placed on unusual syllables. The name is derived from literary

scansion Scansion ( , rhymes with ''mansion''; verb: ''to scan''), or a system of scansion, is the method or practice of determining and (usually) graphically representing the metrical pattern of a line of verse. In classical poetry, these patterns are ...

, because the speech pattern separates the syllables in a phrase much like scanning a poem counts the syllables in a line of poetry. There is no universal agreement about the exact definition of this term. Some sources require only a noticeable pause between syllables, while others require other speech abnormalities, such as the unusual stress pattern on syllables. Some sources consider it a common, but not necessary, feature of ataxic dysarthria; others consider it exactly synonymous with ataxic dysarthria.

Cause

Scanning speech, like other ataxic dysarthrias, is a symptom of lesions in the

cerebellum The cerebellum (Latin for "little brain") is a major feature of the hindbrain of all vertebrates. Although usually smaller than the cerebrum, in some animals such as the mormyrid fishes it may be as large as or even larger. In humans, the cerebel ...

. It is a typical symptom of

multiple sclerosis Multiple (cerebral) sclerosis (MS), also known as encephalomyelitis disseminata or disseminated sclerosis, is the most common demyelinating disease, in which the insulating covers of nerve cells in the brain and spinal cord are damaged. This d ...

, and it constitutes one of the three symptoms of

Charcot's neurologic triad Charcot's neurologic triad is the combination of nystagmus, intention tremor, and scanning or staccato speech. This triad is associated with multiple sclerosis, where it was first described; however, it is not considered pathognomonic for it. It ...

. Scanning speech may be accompanied by other symptoms of cerebellar damage, such as

gait Gait is the pattern of movement of the limbs of animals, including humans, during locomotion over a solid substrate. Most animals use a variety of gaits, selecting gait based on speed, terrain, the need to maneuver, and energetic efficiency. Di ...

, truncal and limb

ataxia Ataxia is a neurological sign consisting of lack of voluntary coordination of muscle movements that can include gait abnormality, speech changes, and abnormalities in eye movements. Ataxia is a clinical manifestation indicating dysfunction of ...

intention tremor Intention tremor is a dyskinetic disorder characterized by a broad, coarse, and low frequency (below 5 Hz) tremor evident during deliberate and visually-guided movement (hence the name intention tremor). An intention tremor is usually perpendi ...

, inaccuracies in rapidly repeated movements and sudden, abrupt

nausea Nausea is a diffuse sensation of unease and discomfort, sometimes perceived as an urge to vomit. While not painful, it can be a debilitating symptom if prolonged and has been described as placing discomfort on the chest, abdomen, or back of the ...

and

vomiting Vomiting (also known as emesis and throwing up) is the involuntary, forceful expulsion of the contents of one's stomach through the mouth and sometimes the Human nose, nose. Vomiting can be the result of ailments like Food-poisoning, foo ...

. The handwriting of such patients may also be abnormally large.

Management

References

External links

{{Medical resources , DiseasesDB = , ICD10 = {{ICD10, R, 47, 1, r, 47 , ICD9 = , ICDO = , OMIM = , MedlinePlus = , eMedicineSubj = , eMedicineTopic = , MeshID = D004401 Neurological disorders Communication disorders Symptoms and signs: Speech and voice