Nervous
- nucleus of hypoglossal nerve
- nucleus of oculomotor nerve
- nucleus of solitary tract
- nucleus of trochlear nerve
- nucleus proprius
- obturator nerve
- occipital fusiform gyrus
- occipital pole
- occipitotemporal (fusiform) gyrus, occipital part
- occipitotemporal fusiform gyrus temporal part
- occipitotemporal sulcus (Lateral part*)
- oculomotor complex
- oculomotor nerve (III)
- olfactory bulb
- olfactory nerve (I)
- olfactory sulcus
- olfactory tract
- olive
- opercular part of inferior frontal gyrus
- optic radiation
- orbital gyri
- orbital gyri (Frontomarginal gyrus and sulcus*)
- orbital part of inferior frontal gyrus
- orbital part of left inferior frontal gyrus
- orbital part of right inferior frontal gyrus
- orbital sulci (H-shaped orbital sulci*)
- orbital sulci (Lateral Orbital sulcus*)
- paleocortex
- palmar branch of median nerve
- palmar branch of ulnar nerve
- paracentral gyrus and sulcus
- paracentral lobule caudal part
- paracentral lobule, rostral part
- paracentral sulcus
- paracingulate gyrus
- parafascicular nucleus of thalamus
- paravermis of cerebellum
- parietal lobe
- parietal operculum
- parieto-occipital sulcus
- part of midbrain
- peduncle of flocculus
- pellucid septum
- periallocortex
- peripaleocortex
- peripheral nervous system
- perirhinal gyrus
- perirhinal gyrus rostral part of FuGt
- pia
- piriform cortex
- piriform region
- planum polare
- planum temporale
- pontine nuclear group
- pontine tegmentum
- postcentral sulcus
- posterior antebrachial cutaneous nerve
- posterior branch of medial antebrachial cutaneous nerve
- posterior branch of obturator nerve
- posterior cingulate gyrus
- posterior cochlear nucleus
- posterior cord of brachial plexus
- posterior cortical nucleus
- posterior division of inferior trunk of brachial plexus
- posterior division of mandibular nerve
- posterior division of middle trunk of brachial plexus
- posterior division of superior trunk of brachial plexus
- posterior fasciculus proprius
- posterior femoral cutaneous nerve
- posterior funiculus
- posterior group of intralaminar nuclei
- posterior horn of lateral ventricle
- posterior horn of spinal cord
- posterior intermediate orbital gyrus
- posterior interosseous nerve of forearm
- posterior nuclear complex of thalamus
- posterior nucleus of vagus nerve
- posterior parahippocampal gyrus
- posterior part of left middle frontal gyrus
- posterior part of right middle frontal gyrus
- posterior quadrangular lobule
- posterior root of posterior femoral cutaneous nerve
- posterior root of spinal nerve
- posterior segment of eyeball
- posterior spinocerebellar tract
- posterior transverse collateral sulcus
- posterolateral tract
- posteroventral putamen
- precentral sulcus (inferior part)
- precentral sulcus (Superior part)
- precerebellar nuclei
- precuneus
- precuneus cortex
- preoptic region of HTH
- pretectal region
- proper palmar digital branches of median nerve
- proper palmar digital branches of ulnar nerve
- proper plantar digital branches of lateral plantar nerve
- proper plantar digital branches of medial plantar nerve
- prosencephalon
- pudendal nerve
- pulvinar of thalamus
- pyramid of medulla oblongata
- pyramidal part of medulla oblongata
- pyramis of vermis
- radial nerve
- red nucleus
- retina
- reuniens nucleus medioventral nucleus of thalamus
- rhombencephalon
- right (Communicating branch of median nerve with ulnar nerve)
- right (Lunate sulcus)
- right abducens nerve (VI)
- right accessory nerve (XI)
- right accessory nucleus of oculomotor nerve
- right ambient gyrus
- right amygdalohippocampal area
- right amygdaloid complex
- right anterior amygdaloid area
- right anterior branch of medial antebrachial cutaneous nerve