The CSI Office Lab Equipment

Rock Polarizing

Rock Polarizing

Skip a rock across a pond...hear the sound of the rippling splash.

What if we were to feel that vibration (or pick up the polarizing spark) as the stone strikes the water? Maybe we do.

Sound can have a very powerful effect on how we feel and get about in the world. And the bones, tissue and nerves in our head that link to perceiving sound actually originate from our body's ability to sense vibration and electrical current to sustain orientation and balance. Balancing is our true sixth sense - it enables us to sense how our body is moving around in the world and keep us upright.

Yet the simple ability we take for granted is actually operating at the maximum threshold of three systems that must orchestrate in amazing dynamic concert.

It all starts with the first ears developed to perceive vibration outside of water. Alligators and crocodiles use vibration extensively to hunt prey in limited light. Prey, that once grasped, is twirled and torn in a water dervish to make any dancer marvel. With the help of a triangulated tail (broad on three sides) and a highly evolved ability to regulate orientation (in 3-D), these reptiles are also the world's first cosmonauts in training.

Here's how it's done; enter the labyrinth.

Labyrinthus Vestibularis is a latin reference for the region of the inner ear where the semicircular canals converge, close to the cochlea (the hearing organ). The vestibular system works with the visual system to keep objects in focus when the head is moving. Joint and muscle receptors being the third important part in maintaining balance. The brain receives, interprets, and processes the information from these systems that control our balance.

It is named by analogy with the mythical maze that imprisoned the Minotaur, because of its appearance. The labyrinth is a system of fluid passages in the inner ear, that is best appreciated as an "inward to outward build" which includes the vestibular system (providing the sense of balance) and the cochlea which is part of the auditory system.

The bony labyrinth is the network of passages with bone walls lined with the membranous labyrinth. (Sort of like the typical labyrinth outline houses the walking path.) The membranous labyrinth is ensconced within and has the same general form; it is, however, much smaller and is partly separated from the bony walls by quantities of distinct lymph fluid.

In certain places, it is held fast to the walls of the cavity and on its walls the ramifications of the acoustic nerve are distributed.

Within this membranous labyrinth is where we find a central configuration vital to the orientation we also learn -- while we are still encased in amniotic fluid. Yes, it's true, we learn how to orient our head in our mother's womb. Our first acrobatic trick: turning our head downward to begin this life's journey into the birth canal.

Long Hair and Rolling Stones: Creating Fluid Polarity

Like a rosetta-style feature central to the classic labyrinth, twin, delicate organs occupy a central location in the inner ear: the utricle and saccule. These two membranous sacs - vital to a centered existence - use small stones and a viscous fluid to stimulate cilia (hair-like cells) to detect motion and orientation.

The utricle is larger than the saccule and has a dual function to transmit sound and vibration. This intricate structure channels bipolar neurons of the cochlear nerve and the vestibular nerve into the brainstem. The utricle is oblong, transversely compressed and uses a bed of cilia mechano-receptors that are arranged to encode frequency and operate with a polarizing principle to distinguish between degrees of tilting of the head.

The resulting hair cell polarization is excitatory (depolarizing) or inhibitory (hyperpolarizing), respectively. This electrical impulse signals to the vestibular nerve (which takes it to the brainstem) to regulate equilibrium or continue to perceptually refine the signals in the brain.

The saccule is a bed of sensory cells situated closer to the outer world. The saccule's job is to translates head movements into neural impulses which the brain can interpret. This organ is sensitive to linear translations of the head, specifically movements up and down (think about moving on an elevator). When the head moves vertically, the sensory cells of the saccule are disturbed and the neurons connected to them begin transmitting impulses to the brain. These impulses also travel along the vestibular portion of the eighth cranial nerve to the brainstem.

So, the next time someone says you have rocks in your head, be glad for it.

It's all about rock and roll dontcha know...

For more details on Alligator and Crocodilian Hearing see: http://www.koshareyrhythms.com

Randy Eady, Ed. M, NCC is a board-certified rehabilitation counselor and therapeutic program coordinator with 15+ years of experience in patient advocacy and clinical contact related to movement disorders. He served as an Assistant Professor on the Faculty of the USAF Academy in the Department of Behavioral Sciences and Leadership from 1992-97. During his tenure Eady created Ko~Sha~Rey Rhythms Therapeutics.

Eady is a native of Southern Ontario and Western NY and a master-level instructor of bio-resonance and Targeted Vibro-acoustic applications (TvA) as they concern the body's movement pattern generators and organic balance centers. His formal health training and practical engineering experience with the DoE/DoD have led to therapy protocols and research that provide answers to natural healing processes associated distinctively with bio-energetic stimuli for chronic and degenerative illnesses for which traditional medicine provide nominal support such as PTSD.

As creator of the Ancient Walking to Primal Rhythms Program, he is the developer of numerous therapeutic garden designs that offer evidence-based symptom relief as well as a scientific research platform to continue the pursuit of understanding more about the timeless bond between sound and life. His portable therapeutic gardens have been discussed and presented at major international healthcare conferences and can be found at numerous musical festivals throughout the world or where his Healing Sound and Primal Rhythms workshops are offered.

How to tell what filter fits your glass?

I am new the the "filters" for camera lenses having just found this out, yes I have been living under a rock , how do I tell what size fits what lens?

On the lens ther is a O with a / through it with a number, this number represents in mm the size filter you need.

http://images.jakeludington.com/camcorder/lens_ring_size.jpg

Just like in the picture above.

The Dead Milkmen "Methodist Coloring Book"

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