Quran's scientific miracle in revealing that spinal column and ribs affect ejaculation during intercourse.
Let people then consider what they were created from! (5) They were˺ created from a spurting fluid (6), stemming from between the backbone and the ribcage (7). Sura At-Tariq 86
By: Mohamad Massarweh
These verses point for the fact that the ejaculated sperm (spurting fluid) during the intercourse is affected by the vertebrae and ribs. Recently, studies reported about the existence of spinal neuronal pathways (inside the vertebral column) called "Spinal Ejaculation Generator". This center is composed of specialized neurons located at the Lumbar vertebrae. It receives and integrates the sensory and motor signals coming from the brain and the pelvis. Consequently, the called "Spinal Ejaculation Generator" signals for two neural foci that control the process of ejaculation. The first focus is located between the lowest thoracic vertebra T12(jointed to also to a rib) and first lumbar one L1, it activates the "hypogastric ganglion" which leads for the first phase of the ejaculation process (emission) by causing the bladder neck to be closed so that semen cannot travel backward. Then the prostate and the seminal vesicles add their seminal fluids to the urethra. There they are joined by sperm that traveled from the Epididymis to create the semen.
The second phase (expulsion) is controlled by the second foci located between the second and the fourth sacral vertebrae S2-S4. It increases the blood flow and pressure inside the urethra leading to sequential contractions till ejaculation occurs.