Chapter 3 of 7
TouchPoint Muscle Palpation™
TouchPoint Muscle Palpation: The Confidence of Knowing
TouchPoint muscle palpation is a tonal approach to subluxation analysis, evaluating paravertebral muscle response to proprioceptive input.
Physiology Behind Working Muscles
TouchPoint muscle palpation is an applied muscle palpation technique, and a tonal approach to the analysis of vertebral subluxation offering a unique insight regarding vertebral position and thus proper line of correction. The style of muscle palpation, as presented in this class, was first used by Reggie Gold, DC. TouchPoint muscle palpation is based upon analysis of the tone of specific para-spinal muscles in response to proprioceptive input from the central nervous system.
Key Principle
Increased tone of paravertebral muscles indicates a corrective response by the CNS to correct subluxation. — Basic and Clinical Anatomy of the Spine, Spinal Cord and ANS, 2nd ed., Cramer & Darby, 2005
TouchPoint muscle palpation is the art of evaluating paravertebral muscle reflex response to a loss of proper vertebral joint alignment and subsequent joint restriction. The para-spinal muscles of the spine attach directly to the vertebral processes and are stretch sensitive due to their inherent muscle spindles. The stretch reflex causes contraction of the stretched muscle, thus attempting to restore proper joint alignment.
This is a very local response — under the control of the CNS — and differs from a spastic or injured muscle, which presents as a more general response (e.g., due to injury, muscle spasm, splinting, or repetitive use). Correct joint position is maintained by muscles, tendons, ligaments, and joint capsules through the neurological phenomenon of proprioception. When vertebral subluxation occurs, proprioceptive receptors send sensory information to the brain, which then determines proper joint positioning and creates the appropriate muscular response to maintain proper joint position.
We will casually call these ‘tight’ muscles. The body innately attempts to correct vertebral subluxation by increasing the tone of specific para-spinal muscles. The vertebral muscles are said to be in an active tonal state rather than a resting tonal state. These muscles are referred to as ‘working’ — meaning working to restore and maintain proper joint alignment.
Proprioception: Our Silent Sixth Sense
Muscle palpation is a tonal approach to subluxation analysis, evaluating paravertebral muscle response to proprioceptive input. Also known as joint position sense, it is the ability to sense stimuli arising within the body regarding position, motion, and equilibrium.
The brain is ‘aware’ of the biomechanical dysfunction of vertebral subluxation, including:
- Inappropriate muscle length
- Compressive loads on joint surfaces
- Distortion of intervertebral discs
- Joint capsule stretch and deformity
- Vertebral displacement
- Aberrant motion
Proprioception-based control prevents excessive joint loads and excessive vertebral displacement. This is a natural, primordial function within the spine and is accomplished through increased tone of specific paravertebral muscles. The subtle increase in muscle tone is recognized as a ‘corrective response’ by the CNS to subluxation.
Initially, it was thought the muscular system acts to protect spinal joints by preventing extreme joint loads and intervertebral displacement, and that the response is a simple reflex. According to Moroney et al., proprioception-based control occurs with low muscle forces and at low joint loads. In fact, even while joint compressive forces remain below threshold, paraspinal muscles were activated — low joint loads consistent with vertebral subluxation, hence the subtle increased muscle tone is in response to vertebral subluxation.
Vertebral Subluxation Causes
- Inappropriate muscle length
- Compressive load forces on joint surfaces
- Distortion of intervertebral disc
- Vertebral displacement and distress
- Joint capsule derangement and deformity
- Biomechanical dysfunction
- Neurological insult
Mechanoreceptors
Mechanoreceptors are proprioceptive receptors found in muscle spindles, facet capsules, intervertebral discs, articular surfaces, tendons, and ligaments throughout the spine, constantly sending information to the brain regarding joint position and muscle tone.
Mechanoreceptors within the muscle spindles send information to the brain regarding proper joint position. Thus, proper vertebral alignment is maintained intelligently via proprioception through these mechanoreceptors within the para-spinal muscles, associated ligaments/tendons, and joint capsules. Vertebral subluxation causes a loss of proper alignment, thereby stretching muscles attached to the vertebral processes.
There are four types of mechanoreceptors found in the spine which provide afferent input from the muscle spindle and Golgi tendon:
- Pacinian corpuscles
- Meissner corpuscles
- Merkel cells (discs)
- Ruffini nerve endings
Robert McLain, MD, Department of Orthopedic Surgery, Cleveland Clinic, found mechanoreceptors throughout the spine — most numerous in the upper cervical region, suggesting proprioceptive control in this region is more refined than in any other.
Research Note
Guyton's Textbook of Medicine notes that the most important proprioceptive information is derived from joint receptors in the neck and lower spine.
McLain also found mechanoreceptors in spinal facet joints, stating: “The presence of mechanoreceptors in facet capsules proves that even these tissues are monitored by the CNS,” which implies neural input from these facets is important to proprioception.
Our innate response to subluxation includes a proprioceptive response to compressive loads due to displaced segments, and a mechanoreceptor response to capsular derangement, disc distortion, and aberrant muscle stretch as evidenced through EMG. This is not simply a reflex — it is an intelligent response to neurological insult. Essentially, the CNS responds to vertebral subluxation.
Is It Possible to Have Subluxations and Working Muscles Without Pain?
Guyton's Textbook of Medicine notes that it is well known that localized, palpable muscle bands are found in individuals who have no subjective pain complaints. Nociceptors have much higher thresholds than mechanoreceptors, which explains why a subluxation triggering a muscle response occurs without pain.
Our Concept Is Simple
- The body is aware of where the vertebra is and where it is supposed to be.
- The increased muscle tone is a corrective response from the CNS.
- The increased muscle tone is felt when compared to the opposite side.
This is a pure innate response — literally a window into the innate workings of the body. It is a subtle sensation, and practice is essential to refine these tactile skills.
The Procedure
- The child should be as relaxed as possible.
- Palpate gently across the muscle fibers.
- Note the tone of the muscle, comparing it to the opposite side.
In Summary
Muscle Response to Misalignment
- The intrinsic muscles of the spine attach to the vertebral processes and are stretch sensitive due to muscle spindle fibers.
- The mechanism which causes the muscle to respond is called the stretch reflex.
- The muscles are attempting to restore proper juxtaposition to the joint.
Working Muscles
- A working muscle is more “active” and maintains a subtle increase in tone.
- They are found by comparing them to the tone of the same muscle on the opposite side.
- When found, a subtle asymmetry in tone and tension will be noted.
Muscle Response to Subluxation
- Sensory receptors in joint capsules send joint-position information to the brain, enabling one or more para-spinal muscles to respond by increasing tone.
- The body thereby attempts to correct the subluxation by the action of specific vertebral muscles, where the tone of these muscles will be increased above the “normal” tone of the surrounding musculature.
- Correction of a misalignment may occur, either by natural forces of movement during daily activity, or as the result of a force introduced by a chiropractor.
- While muscles, tendons, ligaments, joint capsules, and the vertebra's bony structure dictate position due to anatomical construction, it is the innate wisdom of the body through muscle action that ultimately determines vertebral position.
Over Time
- Imbalance of muscle length contributes to chronic fixation and permanency of subluxation.
- Chronic misalignment and associated hypomobility lead to damaged muscles and connective tissues.
- Decreased mechanoreceptor stimulation and dulled nociception diminish proper neuromuscular responses.
- Permanent structural adaptation occurs — a good reason to begin chiropractic care early in life.
Muscle Palpation Procedure
- Palpate gently and across the belly of each muscle.
- Make a note of the tone of each muscle, comparing it to its counterpart on the opposite side, and decide which one has greater tone.
Isolation Tests
- Isolation tests are used to learn where the muscle is and how it might feel when it is working or tight.
- Isolation tests are NEVER used during an exam of an actual patient.
The Cervical Muscles
| Muscle | Indicates | Location | Finding | |
| SternoCleidoMastoid | Anterior atlas | Between mastoid & sternoclavicular joint | Tight on side of anterior atlas, lateral occiput, or posterior occiput | Watch |
| Superior Oblique | Anterior atlas | Behind mastoid, between atlas TP and occiput | Tight on side of anterior atlas | Watch |
| Splenius Capitis & Semispinalis Capitis | Posterior atlas | Along base of occiput, between midline and mastoid | Tight on side of posterior atlas | Watch |
| Levator Scapula | Lateral atlas | Lateral intertransverse space C1–C2 | Tight on the side of lateral atlas | Watch |
| Splenius Cervicis | Anterior atlas | Medial intertransverse space, C1 TP & C2 TP | Tight on the side of anterior atlas | Watch |
| Inferior Oblique | Anterior atlas | Midway between C1 TP & C2 SP | Tight on side of anterior atlas or opposite C2 SP rotation | Watch |
| RCP Major | C2 rotation | Sub-occipital, midway between EOP and C2 SP | Tight opposite C2 SP rotation | Watch |
| Multifidus | C2–C7 rotation | Between SP & TP, below C2–C7 | Tight opposite SP rotation, C2–C7 | Watch |
Cervical TouchPoint Muscle Scan
| TouchPoint | Muscle |
| Midline | RCP minor |
| Base of occiput | Semispinalis & Splenius Capitis |
| Post-mastoid | Superior oblique |
| Atlas TP | SCM |
| Lateral IT space | Levator scapulae |
| Medial IT space | Splenius cervicis |
| Lateral C2 SP | Inferior oblique |
| Above C2 SP | RCP major |
| Lamina gutter | Multifidus |
The Thoracic–Lumbar–Sacral–Pelvis Muscles
| Muscle | Indicates | Location | Finding | |
| Multifidus | T1–L5 rotation | Between SP & TP-MP, below T1–L5 | Tight opposite SP rotation, T1–L5 | Watch |
| Longissimus | Inferior sacrum (AI or PI) | Medial erector spinae, mid lumbar to sacral base | Tight on side of inferior sacrum | Watch |
| Iliocostalis | Inferior ilium (PI) | Lateral erector spinae, mid lumbar to PSIS/iliac crest | Tight on side of inferior ilium | Watch |
| Sacro-Iliac Ligament | PI ilium or AS ilium | Throughout SI joint, above and below PSIS | Tight on side of posterior/anterior sacrum, PI ilium (upper), AS ilium (lower) | Watch |
| Gluteus Medius | AS ilium | Lateral and slightly inferior to the PSIS | Tight on the side of AS ilium | Watch |
| Gluteus Maximus | Inferior sacrum | Lateral border of sacrum | Tight on the side of inferior sacrum (PI or AI) | Watch |
| Piriformis | Posterior sacrum | Mid buttock, lateral to the 3rd sacral tubercle | Tight on the side of posterior sacrum / inferior sacrum | Watch |
| Sacro-Tuberous Ligament | Inferior sacrum or PI ilium | Between apex of sacrum & ischial tuberosity | Tight on side of inferior sacrum (AI or PI) or PI ilium | Watch |
Thoracic–Lumbar–Pelvic TouchPoint Scan
| TouchPoint | Muscle |
| Lamina gutter, T/L spine | Multifidus |
| Erectors, L3–sacral base | Longissimus (medial) / Iliocostalis (lateral) |
| Sacro-iliac ligament | Above & below |
| Lateral to PSIS | Gluteus medius |
| Lateral edge of sacrum | Gluteus maximus |
| Lateral mid-sacrum | Piriformis |
| Between apex & ischial tuberosities | Sacro-tuberous ligament |