My limbs collapse, my mouth becomes completely dry, trembling there is in my body, and my hair stands on end

The somatic symptoms of viṣāda (despair) are precise: sīdanti (sink, decay, lose strength) describes muscular flaccidity; pariśuṣyati (dries completely) is the cessation of secretions; vepathuḥ (trembling) affects the motor system; roma-harṣaḥ (horripilation, erection of hair) is an autonomic response to extreme stress.

This is ancient medical literature. Each symptom corresponds to activation of the sympathetic nervous system — Arjuna’s body responds to psychic trauma with preparation for flight or paralysis, not for combat.

The ca (and) that connects the lines creates a rhythm of accumulation: the whole body is in rebellion against the violence that the mind tries to rationalize.