Anatomy of Alignment:
Part of building the connection between body and mind is becoming more aware of the sensory feedback your body provides.
The first step is to find your Base-Line, the central reference needed to increase awareness of your sense of position, motion and balance - your sense of proprioception, and to feel your state of alignment.
Increased awareness of your midline allows you to feel the relative positioning of the rest of your body - to feel your posture. Being able feel your posture - the position of all of your body - comes with time and focus. Many parts of the body will provide sensory information to help you feel your midline.
Feel the air flow as you breath in and up through your nostrils.
Placing a finger over one nostril and breathing through the other is a great way to increase bodiliy awareness and feeling alignment of the upper body relative to
Breathe out through your mouth and feel the air flow through your lips. The jaw bone is attached to the skull by muscles, a lot of movement is possible when there are no restrictions in the surrounding tissues. Sensory information from lips, contacting teeth etc etc. Many disiplines mention tongue position. From placing the tip of your tongue behind your central incisors (front teeth), to rolling your tongue up and backwards so the under-surface contacts the hard palette (roof of mouth). Use your tongue and hard palette to provide sensory feedback about the relative positions of your skull and jaw. Experiment, see what helps to feel the position in relation to your Base-Line. Lots of muscles associated with the eyes can be used to provide sensory feedback.Mouth.
Tongue.
Eyes.