Pure Amorphagnosia without Tactile Object Agnosia
A 54-year-old female showed amorphagnosia without ahylognosia and tactile agnosia 40 days after the onset of right cerebral infarction. Her basic somatosensory functions were normal. The appreciation of substance qualities (hylognosia) was preserved, but the patient’s inability to recognize the size...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Karger Publishers
2017-04-01
|
| Series: | Case Reports in Neurology |
| Subjects: | |
| Online Access: | http://www.karger.com/Article/FullText/466684 |
| _version_ | 1819211640631984128 |
|---|---|
| author | Shinichirou Kubota Mai Yamada Hideyo Satoh Akira Satoh Mitsuhiro Tsujihata |
| author_facet | Shinichirou Kubota Mai Yamada Hideyo Satoh Akira Satoh Mitsuhiro Tsujihata |
| author_sort | Shinichirou Kubota |
| collection | DOAJ |
| description | A 54-year-old female showed amorphagnosia without ahylognosia and tactile agnosia 40 days after the onset of right cerebral infarction. Her basic somatosensory functions were normal. The appreciation of substance qualities (hylognosia) was preserved, but the patient’s inability to recognize the size and shape (morphagnosia) was confined to 2- and 3-dimensional shapes (amorphagnosia) in the left hand. However, the patient’s ability to recognize real daily objects was well preserved. Brain MRI after admission showed ischemic lesions confined to the right pre- and postcentral gyri and the medial frontal cortex on DWI and FLAIR images. An analysis of SPECT images revealed that the most decreased areas were localized to the pre- and postcentral gyri, superior and inferior parietal lobules, supramarginal gyrus, and angular gyrus. Considering the previous reported cases, the responsible lesion for the impaired perception of hylognosia and morphagnosia may not necessarily be confined to the right hemisphere. To date, 5 reports (6 cases) of tactile agnosia have been published; 4 cases presented with both ahylognosia and amorphagnosia, while 1 presented with only amorphagnosia, and another showed amorphagnosia and mild ahylognosia. Our case is the first to present with only amorphagnosia without tactile agnosia. The mechanism for the well-preserved recognition of real objects may depend on the preserved hylognosia. Of note, there have been no reports showing only ahylognosia without amorphagnosia. Further studies are necessary to clarify whether or not patients with preserved hylognosia or morphagnosia retain the ability to perceive real objects. |
| first_indexed | 2024-12-23T06:30:17Z |
| format | Article |
| id | doaj.art-8fa9d999b9654cbba6211eb35872e81d |
| institution | Directory Open Access Journal |
| issn | 1662-680X |
| language | English |
| last_indexed | 2024-12-23T06:30:17Z |
| publishDate | 2017-04-01 |
| publisher | Karger Publishers |
| record_format | Article |
| series | Case Reports in Neurology |
| spelling | doaj.art-8fa9d999b9654cbba6211eb35872e81d2022-12-21T17:56:57ZengKarger PublishersCase Reports in Neurology1662-680X2017-04-0191626810.1159/000466684466684Pure Amorphagnosia without Tactile Object AgnosiaShinichirou KubotaMai YamadaHideyo SatohAkira SatohMitsuhiro TsujihataA 54-year-old female showed amorphagnosia without ahylognosia and tactile agnosia 40 days after the onset of right cerebral infarction. Her basic somatosensory functions were normal. The appreciation of substance qualities (hylognosia) was preserved, but the patient’s inability to recognize the size and shape (morphagnosia) was confined to 2- and 3-dimensional shapes (amorphagnosia) in the left hand. However, the patient’s ability to recognize real daily objects was well preserved. Brain MRI after admission showed ischemic lesions confined to the right pre- and postcentral gyri and the medial frontal cortex on DWI and FLAIR images. An analysis of SPECT images revealed that the most decreased areas were localized to the pre- and postcentral gyri, superior and inferior parietal lobules, supramarginal gyrus, and angular gyrus. Considering the previous reported cases, the responsible lesion for the impaired perception of hylognosia and morphagnosia may not necessarily be confined to the right hemisphere. To date, 5 reports (6 cases) of tactile agnosia have been published; 4 cases presented with both ahylognosia and amorphagnosia, while 1 presented with only amorphagnosia, and another showed amorphagnosia and mild ahylognosia. Our case is the first to present with only amorphagnosia without tactile agnosia. The mechanism for the well-preserved recognition of real objects may depend on the preserved hylognosia. Of note, there have been no reports showing only ahylognosia without amorphagnosia. Further studies are necessary to clarify whether or not patients with preserved hylognosia or morphagnosia retain the ability to perceive real objects.http://www.karger.com/Article/FullText/466684Cerebral infarctionAhylognosiaTactile agnosiaAmorphagnosia |
| spellingShingle | Shinichirou Kubota Mai Yamada Hideyo Satoh Akira Satoh Mitsuhiro Tsujihata Pure Amorphagnosia without Tactile Object Agnosia Case Reports in Neurology Cerebral infarction Ahylognosia Tactile agnosia Amorphagnosia |
| title | Pure Amorphagnosia without Tactile Object Agnosia |
| title_full | Pure Amorphagnosia without Tactile Object Agnosia |
| title_fullStr | Pure Amorphagnosia without Tactile Object Agnosia |
| title_full_unstemmed | Pure Amorphagnosia without Tactile Object Agnosia |
| title_short | Pure Amorphagnosia without Tactile Object Agnosia |
| title_sort | pure amorphagnosia without tactile object agnosia |
| topic | Cerebral infarction Ahylognosia Tactile agnosia Amorphagnosia |
| url | http://www.karger.com/Article/FullText/466684 |
| work_keys_str_mv | AT shinichiroukubota pureamorphagnosiawithouttactileobjectagnosia AT maiyamada pureamorphagnosiawithouttactileobjectagnosia AT hideyosatoh pureamorphagnosiawithouttactileobjectagnosia AT akirasatoh pureamorphagnosiawithouttactileobjectagnosia AT mitsuhirotsujihata pureamorphagnosiawithouttactileobjectagnosia |