The term “neck joint” can refer to a few different things, depending on the context:

1. Anatomy (Human Body):

• Atlantoaxial Joint: This is a crucial synovial joint in the upper part of the neck, between the first and second cervical vertebrae (C1, the atlas, and C2, the axis). It’s primarily a pivot joint that allows for rotation of the head (the “no” movement).
• Atlanto-occipital Joint: This joint connects the skull (occipital bone) to the first cervical vertebra (atlas). It’s responsible for movements like nodding (flexion and extension of the head).
• Other Cervical Spine Joints: The cervical spine (neck) has other joints between its seven vertebrae (C1-C7), including intervertebral discs and facet joints, which contribute to the neck’s flexibility and ability to perform movements like flexion, extension, rotation, and side-bending.

2. Guitars and Musical Instruments:

• This refers to the way the neck of a guitar (or other stringed instrument) is attached to its body. The type of neck joint significantly impacts the instrument’s tone, sustain, and playability.
  • Bolt-on Neck: The neck is attached to the body with screws, often with a metal plate. This is common in Fender guitars and allows for easier repairs and modifications.
  • Set-neck: The neck is glued into a pocket or mortise in the body, often using a dovetail joint. This is common in Gibson guitars and is known for providing good sustain and resonance.
  • Neck-Thru: The neck is a continuous piece of wood that runs through the entire length of the guitar body. The “wings” of the body are then glued to this central neck piece. This design offers excellent sustain and upper fret access.

3. Woodworking:

• In general woodworking, a “neck joint” refers to any joint used to connect a narrower piece (like a “neck”) to a larger piece. While the term isn’t a standardized woodworking joint type itself, it would encompass various techniques, often those used in instrument making like dovetails, mortise and tenon joints, or even bolted connections. The goal is always a strong and stable connection.

4. Clothing/Photography (E-commerce):

• In the context of e-commerce and product photography, “neck joint” refers to a photo editing technique (also known as “ghost mannequin” or “invisible mannequin”). This involves digitally removing the mannequin or model from a clothing item’s photo to create a hollow, 3D-like effect, making the garment appear as if an invisible person is wearing it. This helps showcase the true shape and fit of the clothing for online shoppers.