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Spinal > Coccyx > Flashcards

Coccyx Flashcards

1
Q

What is the number of coccygeal somites?

A

Ten

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2
Q

What is the typical number of segments that unite to form the adult coccyx?

A

4 segments

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3
Q

When is ossification of coccyx completed?

A

About age 30

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4
Q

What is the homolog of the superior articular process and facet on Co1?

A

Coccygeal Cornu

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5
Q

What is the major motion and range of motion for coccyx?

A

Flexion - extension, 5-20 degrees

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6
Q

How many coccygeal nerves are present in the fetus?

A

Typically 5 Paris of coccygeal nerves are present

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7
Q

How many coccygeal nerves are present in the adult?

A

Typically only one pair of coccygeal nerves remain in the adult

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8
Q

What is the ganglion impar?

A

A midline sympathetic ganglion

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9
Q

What is the coccygeal glomus or coccygeal body?

A

An enlarged encapsulated arteriovenous anastomosis located near the last segment of coccyx

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10
Q

What innervates the coccygeal glomus or coccygeal body?

A

Both sympathetic and parasympathetic fibers are IDed

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11
Q

What muscles attach to the coccyx?

A

Ischiococccygeus and levator ani

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12
Q

What is the homolog for the posterior longitudinal ligament at Co1?

A

Deep posterior sacrococcygeal ligament

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13
Q

What is the homolog for the anterior longitudinal ligament at Co1?

A

Anterior sacrococcygeal ligament

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14
Q

What forms the inferior boundary of the spinal canal?

A

The union of the superficial posterior and deep posterior sacrococcygeal ligaments

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15
Q

What is the homolog for the capsular ligaments at Co1?

A

Intercornual ligament

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16
Q

What ligaments form the posterior boundary for the Co1 spinal nerve intervertebral Foramen?

A

Superficial posterior sacrococcygeal ligament and intercornual ligament

17
Q

What ligament form the anterior boundary for the Co1 spinal nerve intervertebral Forman?

A

Deep posterior sacrococcygeal ligament and intervertebral disc

18
Q

What bony features are present on the coccyx?

A

All segments are represented by a “vertebral body; Co1 has a coccygeal Cornu and TVP”

19
Q

What forms the coccygeal nerve plexus?

A

S4, S5 an dCo1 nerves

20
Q

What is the location of the ganglion impar?

A

Anywhere from the sacrococcygeal joint to the upper third of coccyx

21
Q

What is the homolog you for the ligamentum flavum at Co1?

A

Superficial posterior sacrococcygeal ligament

Spinal (47 decks)

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