II. Definitions
- Occipital Lobe
- Occipital Lobe primarily functions to receive and process visual input
- Brodmann Area 17 (V1) receives sensory input from the lateral geniculate nucleus in the Thalamus
- Subsequent signal processing
- Ventral stream (V2, Area 18) for form recognition and object representation
- Dorsal stream which processes motion and spatial orientation
- Further visual processing is performed in V4, a part of the Associative visual cortex (Area 19).
III. Anatomy: Brodmann Areas of Occipital Lobe
- Images
- Primary visual cortex (V1, Area 17)
- Receives sensory input from the lateral geniculate nucleus in the Thalamus.
- Lesions to this Primary visual cortex result in blindness of the contralateral Visual Field.
- Signals are then passed to the ventral stream (V2)
- Form recognition and object representation
- Signals are passed to the dorsal stream
- Processes motion and spatial orientation
- Secondary Visual Cortex (V2, Area 18)
- Part of the ventral stream, V2 receives visual input from the Primary visual cortex (V1)
- Processes the information for form recognition and object representation
- Also sends signals to the Associative visual cortex (V4) for further processing
- Associative visual cortex (V3, V4, V5, Area 19)
- Part of the ventral stream, V4 receives visual input from the Secondary Visual Cortex (V2)
- Further processes the information for form recognition and object representation
- Lesions to V4 will result in visual Agnosia (difficulty in object recognition)
IV. Exam
- Matches colors and objects (if unable to name them)
V. Signs: Brain Lesions
- Contralateral Hemianopia
VI. References
Images: Related links to external sites (from Bing)
Related Studies
| Definition (FMA) | Occipital lobe is the one of five lobes of the cerebral hemisphere which occupies the posterior-most portion of the hemisphere. Anteriorly, it shares an arbitrary border with the parietal lobe and temporal lobe. Medially, it is bounded by the longitudinal cerebral fissure. |
| Definition (NCI) | The posterior part of the cerebral hemisphere. (MeSH) |
| Definition (NCI_CDISC) | The posterior part of the cerebral hemisphere. (MeSH) |
| Definition (MSH) | Posterior portion of the CEREBRAL HEMISPHERES responsible for processing visual sensory information. It is located posterior to the parieto-occipital sulcus and extends to the preoccipital notch. |
| Concepts | Body Part, Organ, or Organ Component (T023) |
| MSH | D009778 |
| SnomedCT | 31065004 |
| English | Occipital Lobes, Lobe, Occipital, Lobes, Occipital, Occipital Lobe, Occipital lobe, Tiss of occipital lobe brain, Tissue of occipital lobe of brain, Regio occipitalis, Occipital region, Occipital cortex, occipital lobes, lobe occipital, occipital lobe, OL, occipital region, occipital cortex, Lobus occipitalis, Occipital lobes, OCCIPITAL LOBE, Occipital Region, Region, Occipital, Occipital Regions, Regions, Occipital, Occipital lobe structure (body structure), Occipital lobe structure, Occipital lobe, NOS, lobus occipitalis |
| Swedish | Nacklob |
| Czech | okcipitální lalok |
| Finnish | Takaraivolohko |
| Russian | ZATYLOCHNAIA DOLIA, ЗАТЫЛОЧНАЯ ДОЛЯ |
| Croatian | Not Translated[Occipital Lobe] |
| Polish | Płat potyliczny |
| Norwegian | Occipitallapp, Bakhodelapp, Lobus occipitalis |
| Spanish | estructura del lóbulo occipital (estructura corporal), estructura del lóbulo occipital, lóbulo occipital, Lóbulo Occipital |
| French | Lobe occipital |
| German | Okzipitallappen |
| Italian | Lobo occipitale |
| Dutch | Achterhoofdskwab, Achterkwab, Lobus occipitalis (cerebri), Occipitaalkwab |
| Portuguese | Lobo Occipital |
Ontology: Structure of cuneus (C0152307)
| Concepts | Body Part, Organ, or Organ Component (T023) |
| MSH | D009778 |
| SnomedCT | 74493001 |
| English | Cuneate lobule, Cuneus of hemisphere, Cuneus gyrus, cuneate lobule, cuneus of hemisphere, cuneus gyrus, Cun, cuneus, Gyrus cuneus, Cuneus Gyrus, Cuneate Lobules, Lobule, Cuneate, Lobules, Cuneate, Gyrus, Cuneus, Cuneate Lobule, Cuneus, Structure of cuneus (body structure), Structure of cuneus |
| Spanish | cuneus, cuña, estructura del cuneus (estructura corporal), estructura del cuneus |
Ontology: Lingual gyrus (C0152308)
| Concepts | Body Part, Organ, or Organ Component (T023) |
| MSH | D009778 |
| SnomedCT | 7344002 |
| English | Lingual gyrus, Lingula of cerebral hemisphere, Medial occipitotemporal gyrus-2, lingula of cerebral hemisphere, medial occipitotemporal gyrus-2, lingual gyrus, medial occipitotemporal gyrus, LiG, Gyrus lingualis, Gyrus occipitotemporalis medialis, Gyrus Lingualis, Gyrus, Lingual, Gyrus, Medial Occipitotemporal, Occipitotemporal Gyrus, Medial, Gyrus Linguali, Lingualis, Gyrus, Lingual Gyrus, Medial Occipitotemporal Gyrus, Linguali, Gyrus, Structure of lingual gyrus (body structure), Structure of lingual gyrus |
| Spanish | circunvolución lingual, estructura de la circunvolución lingual (estructura corporal), estructura de la circunvolución lingual |
Ontology: lateral occipital gyrus (human only) (C0228228)
| Concepts | Body Part, Organ, or Organ Component (T023) |
| SnomedCT | 22735005 |
| English | Gyrus occipitalis lateralis, Middle occipital gyrus, middle occipital gyrus, lateral occipital gyrus, MOcG, Gyrus occipitalis medius, Gyrus occipitalis secundus, lateral occipital gyrus (human only), Lateral occipital gyrus, Structure of lateral occipital gyrus (body structure), Structure of lateral occipital gyrus |
| Spanish | circunvolución occipital lateral, estructura de la circunvolución occipital lateral (estructura corporal), estructura de la circunvolución occipital lateral |
Ontology: superior occipital gyrus (human only) (C0228230)
| Concepts | Body Part, Organ, or Organ Component (T023) |
| SnomedCT | 1092001 |
| English | superior occipital gyrus, SOG, Gyrus occipitalis primus, Gyrus occipitalis superior, superior occipital gyrus (human only), Superior occipital gyrus, Structure of superior occipital gyrus (body structure), Structure of superior occipital gyrus |
| Spanish | circunvolución occipital superior, estructura de la circunvolución occipital superior (estructura corporal), estructura de la circunvolución occipital superior |
Ontology: Inferior occipital gyrus (C0228231)
| Concepts | Body Part, Organ, or Organ Component (T023) |
| SnomedCT | 87408004 |
| English | Inferior occipital gyrus, Structure of inferior occipital gyrus (body structure), Structure of inferior occipital gyrus |
| Spanish | circunvolución occipital inferior, estructura de la circunvolución occipital inferior (estructura corporal), estructura de la circunvolución occipital inferior |
