Alphabetical list

Fiber-of-passage ( Cajal, 1894a ) : Segment of a nerve fiber (Ehrenberg, 1833) that passes through a gray matter region or a white matter tract without forming synapses (Foster & Sherrington, 1897); used by Cajal at least as early as 1894 (1894a, p. 173). Also see axon-of-passage and Cowan et al. (1972, p. 38). more details

Forebrain ( Baer, 1837 ) : Synonym for adult vertebrate endbrain (Kuhlenbeck, 1927); in the original German, "Vorderhirn"; p. 107. For later use see Ariëns Kappers (1929, Figs. 44, 45), Papez (1929, Ch. 40). more details

Forebrain ( FB ; Goette, 1873 ) : The most rostral (Schulze, 1893) of the three primary brain vesicles of the vertebrate neural tube (Baer, 1837) that divides and develops into the adult endbrain (Kuhlenbeck, 1927) and interbrain (Baer, 1837). The adult forebrain is a topographic division lying rostral to the midbrain (Baer, 1837) that was identified by Varolio (1573), who called it the cerebrum in macrodissected humans, see Clarke & O'Malley (1996, pp. 635, 881-882). The primary forebrain vesicle was identified and named such for the embryonic vertebrate neural tube by Baer (1837, p. 106; "vordere Hirnbläschen" in German), and the corresponding part in adults was named by Goette in toads (1873, p. 400). A current synonym is the Latin prosencephalon (Mihalkovics, 1877). more details

Foundational Model of Connectivity ( FMC ; Bota & Swanson, 2010 ) : Abbreviated form of "Foundational Model of Structural Connectivity in the Nervous System". The term is derived from Foundational Model of Anatomy (FMA); see Brinkley (1991). more details

Fourth ventricle ( V4 ; Galen, c177 ) : The rhombic-shaped part of the ventricles (Hippocrates) in the rhombicbrain (His, 1893b), continuous rostrally (Schulze, 1893) with the cerebral aqueduct (His, 1895) and caudally (Cleland, 1879) with the central canal (Henle, 1871). The cerebrospinal fluid in the fourth ventricle communicates with cerebrospinal fluid in the subarachnoid space (Magendie, 1827) through one or more holes in the roof of the fourth ventricle. The fourth ventricle was known from macrodissected adult humans to Herophilus (335-280 BC; see von Staden, 1989, pp. 247-248), and named such by Galen (c177, c192; see translations by Duckworth, 1962, p. 19 and Singer, 1999, p. 235, respectively). more details

Frontal plane ( Henle, 1855 ) : In animals with bilateral symmetry, the plane of section that is parallel to the longitudinal axis (Barclay, 1803) and passes medial (Schulze, 1893)-lateral (Barclay, 1803), orthogonal to the other longitudinal plane, the sagittal plane (Henle, 1855); divides the body into dorsal (Barclay, 1803) and ventral (Schulze, 1893) parts. The term was introduced by Henle (1855, p. 1); also see Kuhlenbeck (1973, p. 114), Brusca & Brusca (1990, Fig. 4-A), Romer (1962, p. 7), Sandring (2008, p. xxii). In quadrupeds it is often confusingly synonymous with transverse plane (Henle, 1855)-see frontal plane (Horsley & Clarke, 1908)-but it has long been argued that positional terms referring to the horizon or other external landmarks, rather than to internal landmarks, be avoided, especially in comparative anatomy; see Wilder & Gage (1882, pp. 21-23). more details

Frontal plane ( Horsley & Clarke, 1908 ) : A synonym for transverse plane (Henle, 1855), commonly used in comparative anatomy. Horsley & Clarke (1908, p. 52) adopted this terminology for use in a stereotaxic instrument and it was adopted for mammals in general, especially in atlases. Also see frontal plane (Henle, 1855). more details

Functional connection : This term has multiple meanings; originally it referred to the physiology of a connection (structural connection), or the observation that a connection actually works. More recently it is used in functional imaging research to indicate that changes in nervous system (Monro, 1783) activity patterns are correlated in time, without direct evidence for structural connections; see Horwitz (2003). more details