Trail Guide to the Body: Spine & Thorax Study Guide

Trail Guide to the Body: Spine & Thorax

Introduction

• This study guide focuses on the surface anatomy, bony landmarks, and functional relationships of the spine and thorax.

Learning Objectives

• Surface Anatomy Recognition:
    - Recognize the surface anatomy, including skin and fascial structures, of the spine and thorax.
• Palpation Skills:
    - Palpate the bones and bony landmarks of the spine and thorax.
    - Recognize connections between bony landmarks and soft tissues.
• Identification of Important Structures:
    - Identify landmarks that indicate underlying nerve and blood vessel locations for safe practice in manual therapies.
• Topographical Relationships:
    - Describe relationships between topographical contours and underlying musculoskeletal structures.
    - Explain the texture, thickness, and mobility of the skin and fascial structures.
• Joint Structures:
    - Name and locate the bones, bony landmarks, and joints for the spine and thorax.
    - Describe connections between them and soft tissues.
• Common Injury Sites:
    - Identify major joint structures, including ligaments and bursae, that are common sites of pain and injury.

Injury Case Study: Subjective History

• Subject Information:
    - Age: 19 years old
    - Sex: Female collegiate rower
    - Chief Complaint: Lower back pain (LB p+) for the last 6 weeks
    - Onset: Began during winter training camp following increased rowing erg volume.
• Symptoms:
    - Reports morning stiffness, with a deep ache localized to the lumbar spine and occasional sharp pain.
    - Pain severity rated: 7/10 during rowing, 3/10 at rest.
• Aggravating Factors:
    - High-volume training sessions, lumbar extension, prolonged sitting, maintaining posture during rowing drive phase, and sleeping on her back.
• Alleviating Factors:
    - Ice and rest, providing only temporary relief.
• Additional Notes:
    - No neurological symptoms reported.
    - No personal history of lower back injuries.

Injury Case Study: Objective Findings

• Observations:
    - Postural assessment shows increased lumbar lordosis and anterior pelvic tilt.
• Palpation Findings:
    - Tenderness to palpation (TTP) over the pars region of L5.
    - Hypertonicity observed in the paraspinal muscles and gluteus muscles.
• Active Range of Motion (AROM):
    - Lumbar flexion: 4/5 discomfort at end range.
    - Lumbar extension: 2/5 with pain.
    - Side bending: Limited due to tightness.
• Special Tests:
    - Positive Stork test (pain with single-leg lumbar extension).
    - Positive quadrant test.
    - Negative straight leg raise and slump tests.
• Functional Assessment:
    - Core endurance testing indicates poor trunk stabilization under load.
• Question: What injury do you think this athlete sustained?

Surface Features Visible on Spine and Thorax

• Landmarks:
    - Jugular notch
    - Sternum
    - Ribs
    - Edge of the rib cage
    - Rectus abdominis
    - External oblique
    - Umbilicus
    - Iliac crest
    - Inguinal ligament
• Landmarks Over Different Regions:
    - C7 to T3: Medial border of the scapula
    - T3 to T10: Spinous process of C-7, thoracic, and lumbar vertebrae.
    - Twelfth rib and iliac spine (PSIS) locations.
    - Rule of Threes for identifying vertebral positions relative to the skin surface.

Curvatures of the Spine

• Vertebral Column Structure:
    - Cervical vertebrae (7), thoracic vertebrae (12), lumbar vertebrae (5), sacrum (5), and coccyx (tailbone) (3-5).
• Curvatures:
    - Cervical lordosis: the normal curve of the cervical spine.
    - Thoracic kyphosis: outward curve present at birth.
    - Lumbar lordosis: developed as a child grows and learns to sit upright.
• Primary and Secondary Curvatures:
    - Primary: present in fetus, secondary develops with motor function.

Basic Structure of the Vertebra

• Components of a Typical Vertebra:
    - Vertebral Body
    - Lamina
    - Vertebral Arch
    - Pedicle
    - Spinous Process
    - Transverse Process
    - Superior and Inferior Facets
    - Vertebral Foramen

Cervical Vertebrae Specifics (C1-C7)

• Atlas (C1):
    - Unique in lacking a body and having an anterior and posterior tubercle.
    - Allows the nodding motion of the head.
• Axis (C2):
    - Features the Odontoid process (dens), allowing rotation of the head.
• General Anatomy of C3-C7:
    - Include features like transverse foramen, spinous process, and superior articular facets.

Thoracic Vertebrae Specifics (T1-T12)

• Typical vs. Atypical:
    - Atypical Vertebrae: T1, T10, T11, T12 (unique facets and structures).
    - Typical Vertebrae: T2-T9 having distinctive demifacets for rib articulation.

Lumbar Vertebrae Specifics (L1-L5)

• Characteristics:
    - Larger bodies to support greater weight.
    - No costal facets as ribs do not articulate here.

The Thorax

• Anatomical Features:
    - Composed of the rib cage, sternum, and costal cartilage.
    - Rib Types:
      - True ribs (1-7): Directly connected to sternum.
      - False ribs (8-10): Indirectly connected through cartilaginous connections.
      - Floating ribs (11-12): Have no connection to the sternum.
• Rib Structure:
    - Includes head, neck, tubercle, body/shaft, and costal groove.

Assessment and Diagnosis in the Case Study

• Diagnosis of the Athlete:
    - Spondylolysis (pars stress fracture) at L5.
• Key Indicators:
    - Pain onset linked to increased training load and lumbar extension.
    - Hypertonicity of muscles and positive special tests indicating instability.

Quiz Questions

• Includes various identification challenges focusing on structures mentioned earlier, emphasizing learning through active engagement.

Conclusion

• This guide encapsulates essential information regarding the anatomy of the spine and thorax, practical palpation skills, and insights into injury management relevant to sports activities.