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Afferent paresis: Difficulty executing smooth, coordinated, fine movements as a result of loss of afferent (somatosensory) feedback from the muscles engaged in the motor activity. Paresis is a condition typified by a weakness of voluntary movement, or partial loss of voluntary movement or by impaired movement. 

Testing stereognosishttp://www.youtube.com/watch?v=6fyiGUAg2GY

Testing simultaneous extinction http://neuroexam.med.utoronto.ca/sensory_7.htm

A tactile analogue of blindsight

The man who lost his body (lack of proprioception)http://www.youtube.com/watch?v=FKxyJfE831Q

Anosognosia (nosos, "disease"). https://www.youtube.com/watch?v=uj6ozlzA45o

Pain asymbolia, also called pain dissociation, is a condition in which pain is experienced without unpleasantness. https://www.youtube.com/watch?v=7OLmnNdOtDEUpdate: The Little Girl Who Couldn't Feel Pain | Where Are They Now? | Oprah Winfrey Network https://www.youtube.com/watch?v=bRaCFUtpxFU

Balint’s syndrome http://www.youtube.com/watch?v=TVZmLtrOvTcBalint’s syndrome patient http://www.youtube.com/watch?v=4odhSq46vtU

4. Ocular apraxia; the absence of, or a defect in, the control of voluntary purposeful eye movement.

Modified NIHSS – Neglect Scoring http://www.youtube.com/watch?v=UKAOP85B14ENeglect patienthttp://www.youtube.com/watch?v=ADchGO-0kGo

Why happening?1)Sensation and perception (amorphosynthesis)2)Attention and orientation (arousal to stimuli)Why more common in right hemisphere damage?Not compensated by left hemisphere, whereas right visual field is supported by both hemisphere?

Gerstmann Syndrome – patienthttps://www.youtube.com/watch?v=GLJdcmSIoNQ

Alexia and Dyslexia; the writer who could not readhttps://www.youtube.com/watch?v=KERQv9FIxkw

Apraxia (from Greek praxis, an act, work, or deed) is the inability to execute learned purposeful movements, despite having the desire and the physical capacity to perform the movements.

Apraxia - Patients Simple purposeful movements: https://www.youtube.com/watch?v=vTFdNk7JIoo Dressing apraxia: https://www.youtube.com/watch?v=gewP1T7GYccVerbal apraxia: https://www.youtube.com/watch?v=XNB0ihI2srQ

Topographical Disorientation, also known as Topographical agnosia andTopographagnosia, is the inability to orient oneself in one's surroundings

Cross-modal matchingA scaling method used in psychophysics in which an observer matches the apparent intensities of stimuli across two sensory modalities, as when an observer adjusts the brightness of a light to indicate the loudness of a variable stimulus sound. Some authorities consider magnitude estimation and magnitude production to be forms of cross-modal matching in which one modality is the observer's perception of the number system. Also called cross-modality matching.