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Facial bilateral symmetry is typically defined as fluctuating asymmetry of the face comparing random differences in facial features of the two sides of the face. [4] The human face also has systematic, directional asymmetry : on average, the face (mouth, nose and eyes) sits systematically to the left with respect to the axis through the ears ...
Since Harlequin syndrome is associated with a dysfunction in the autonomic nervous system, main symptoms of this dysfunction are in the following: Absence of sweat and flushing on one side of the face, neck, or upper thoracic area. In addition, other symptoms include cluster headaches, tearing of the eyes, nasal discharge, abnormal contraction ...
For example, one patient described a person's face as having a nose deviated to the side, the mouth lying at a diagonal and one eyebrow being higher than the other. [5] Prosopometamorphopsia may either involve perceptions of the whole face or only one side of the face (usually after right hemisphere damage). [6]
Prosopagnosia, [2] also known as face blindness, [3] is a cognitive disorder of face perception in which the ability to recognize familiar faces, including one's own face (self-recognition), is impaired, while other aspects of visual processing (e.g., object discrimination) and intellectual functioning (e.g., decision-making) remain intact.
Hemifacial microsomia (HFM) is a congenital disorder that affects the development of the lower half of the face, most commonly the ears, the mouth and the mandible.It usually occurs on one side of the face, but both sides are sometimes affected.
Electromotor allochiria has been observed in the face, lower limbs, and upper limbs. [12] In these cases, a stimulus presented on the affected side caused contraction of the opposite facial muscles with a current so weak that the healthy facial did not react. Another example is that pressure on one forearm caused movement of the opposite forearm.
Bell's palsy is a type of facial paralysis that results in a temporary inability to control the facial muscles on the affected side of the face. [1] In most cases, the weakness is temporary and significantly improves over weeks. [4] Symptoms can vary from mild to severe. [1]
Hemifacial spasm (HFS) is a rare neuromuscular disease characterized by irregular, involuntary muscle contractions on one side (hemi-) of the face (-facial). [1] The facial muscles are controlled by the facial nerve (seventh cranial nerve), which originates at the brainstem and exits the skull below the ear where it separates into five main branches.