BrainCenterNSA NC IPS

Intraparietal Sulcus

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This page covers biological details of component group Intraparietal Sulcus. Component group is part of aHuman target integrated biological model.

• Top-down path to center: Cortex -> Parietal Lobe (NC.LOBE.PAR) -> Intraparietal Sulcus (NSA.NC.IPS) (see Mind Maps)
• Function: Perceptual-motor coordination and visual attention, eye movements and reaching
• Notes to function: PG, Control of saccadic eye movements, visual control of grasping

(generated)

Components

(generated)

Component items:

• Posterior Eye Field (NPE.NC.IPS.PEF): Reflexive saccade triggering
  • Medial Intraparietal Sulcus: Encode location of reach target in nose-centered coordinates
  • Lateral Intraparietal Sulcus: Representing saliency of spatial locations, and attention to locations
• Ventral Intraparietal Sulcus: Merge visual, somatosensory, auditory, and vestibular senses
• Anterior Intraparietal Sulcus: Represent shape, size, and orientation of objects to be grasped

Connectivity

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Internal Regions Connections:

Source Region	Target Region	Reference
Lateral Intraparietal Sulcus	Anterior Intraparietal Sulcus	Primate Control of Grasping (PIP -> AIP, abstract)
Dorsal Associative Visual Cortex	Lateral Intraparietal Sulcus	Primate Control of Grasping (VC -> PIP, abstract)
Inferotemporal Cortex	Anterior Intraparietal Sulcus	Primate Control of Grasping (IT -> AIP, abstract)
Preoccipital Inferotemporal Area	Medial Intraparietal Sulcus	3 Visual Cortex Paths (IT -> IPS, abstract)
Middle Temporal Area	Lateral Intraparietal Sulcus	Paths from Retina to Parietal Cortex and IT (MT -> LIP)
	Ventral Intraparietal Sulcus	Paths from Retina to Parietal Cortex and IT (MT -> VIP)
Parietooccipital Area	Lateral Intraparietal Sulcus	Parietal Association Cortex (V6 -> LIP)
	Ventral Intraparietal Sulcus	Paths from Retina to Parietal Cortex and IT (PO -> VIP)

External Inbound Center Connections:

Source Center	Reference
Occipital Lobe	Paths from Retina to Parietal Cortex and IT (MT -> LIP)
Inferotemporal Area	3 Visual Cortex Paths (IT -> IPS, abstract)

External Outbound Center Connections:

Target Center	Reference
Reflexes Nuclei of Midbrain Mesencephalon	Vision Components (VAC -> SOA, abstract)
Inferior Parietal Lobule	3 Visual Cortex Paths (IPS -> IPL, abstract)
Medial Parietal Lobule	(unknown reference)
Premotor Cortex	Summary of eye movement control (PEF -> FEF, abstract)
Superior Parietal Lobule	3 Visual Cortex Paths (IPS -> SPL, abstract)