Table 3.

List of definitions

Symbol	Definition	Unit	Type	Value
A	Slope of P–V relation at V0	mmHg	Parameter	2
CBFV	Cerebral blood flow velocity	cm s−1	Data set	—
CBFV	Cerebral blood flow velocity, set to a physiological range	ml s−1	Data input	—
CVP	Central venous pressure	mmHg	Data input	—
CX	Compliance in jugular segment X	ml mmHg−1	Computed	—
g	Gravitational acceleration	m s−2	Parameter	9.8
hX	Height distance from the heart	cm	Parameter	12 < hX < 27
L	Segment length	cm	Parameter	1.5
P	Pressure before the outflow tract	mmHg	Computed	—
P0	Zero flow pressure intercept	mmHg	Parameter	0
PHC	Height-corrected pressure	mmHg	Computed	—
PX	Pressure in segment X	mmHg	Computed	—
QC,X	Net flow into segment X	ml s−1	Computed	—
Qin,X	Flow into segment X	ml s−1	Computed	—
Qjug	Jugular blood flow	ml s−1	Computed	—
Qout,X	Flow out of segment X	ml s−1	Computed	—
Qven plex	Vertebral cervical venous plexus	ml s−1	Computed	—
Rven plex	Resistance in the venous plexus	mmHg s ml−1	Parameter	0.068
RX	Resistance in jugular segment X	mmHg s ml−1	Computed	—
V0	Half-maximal segment volume	cm3	Parameter	0.9
VX	Volume in jugular segment X	cm3	Computed	—
η	Viscosity of blood	mmHg s−1	Parameter	2.9 × 10−5
ρ	Density of blood	kg m−3	Parameter	1.05 × 103